Pics of my headers installed and info about fitment issues - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Yukon Jack** · 05-08-2003, 09:56 AM

Here are some pics of my headers now that they are installed and fitted. This is on my 69 with a 454. These headers are Dynomax Cermacoated headers designed for the 67-87 BBC 2WD. The headers for 73-87 BBC 4WD would not work.

The engine is sitting in the small block engine crossmember using the original small block style engine mounts. I did move the crossmember forward about 3/8" or so to give me better oil pan clearance and header clearance for the first header tube on the passenger side.

To make these headers fit I did not have to make any modifications to the driver's side other than I did have to go with a shorter oil filter as this engine has an oil cooler setup which put the larger oil filter in contact with the headers.

On the passenger side I had to remove a little bit of frame to give clearance for the first and second header tubes. I would guess I removed about 1/4". I also ended up grinding off a little bit of the engine crossmember tower as it was in contact with the bottom of the first header tube. In the end I had to use some spacers that I put between the engine and the engine mount bolts to raise the engine a bit on the passenger side and I also raised the drivers side by using spacers about half as big.

The above modifications have me comfortable with the clearance around the oil pan and passenger side headers.

I will go ahead and post a number of pics showing how the headers sit in the frame and how they are positioned in regards to the Rockwell transfer case as I hope this will be of interest to others who are doing a big block swap in a 67-72 four wheel drive.

First pic is overview of drivers side.

**Yukon Jack** · 05-08-2003, 09:56 AM

This pic is of the driver side collector.

**Yukon Jack** · 05-08-2003, 09:57 AM

Here's a pic again of the drivers side from behind the transfer case.

**Yukon Jack** · 05-08-2003, 09:58 AM

This pics shows how low the driver side collector sits.

**Yukon Jack** · 05-08-2003, 09:59 AM

Here is a pic of the passenger side collector. Did have to grind down the bolt on the lower shackle.

**Yukon Jack** · 05-08-2003, 09:59 AM

Another pic of the passenger side collector.

**Yukon Jack** · 05-08-2003, 10:00 AM

Here's how low the passenger side collector sits.

**Yukon Jack** · 05-08-2003, 10:01 AM

Here's a pic from in front of the engine showign the header pipes.

**Yukon Jack** · 05-08-2003, 10:01 AM

Pic of the passenger side headers.

griesel72 · 05-08-2003, 10:10 AM

me likes!!!!!!!!!

Leave it to a good ol Kansas boy to build a bad a$$ machine

keep us up on it

david

**1970 CST Short Wide** · 05-08-2003, 10:47 AM

Lookin Good Yukon. When you going to make some Smoke with that Bad Boy.

**Yukon Jack** · 05-08-2003, 10:59 AM

A buddy is doing rust repairs on my cab and I should have it back maybe this weekend. Then I get to learn body work and paint - gonna do that myself for some ungodly reason - what am I thinking? So to answer your question, I have no idea - probably a month later than I think :-)

barn9 · 05-08-2003, 11:15 AM

Lookin' good Mark! It needs to be done by June 22nd, lol!! Do you still want to use my HVLP gun?

Riveted1 · 05-08-2003, 11:16 AM

Man, that looks sweeeeeet! Makes me wanna go w/a big block!

**Yukon Jack** · 05-08-2003, 11:17 AM

I know! I'm sweating bullets at this point. Can I have it done - or more correct - can WE have it done. Cause I know I'm gonna enlist you and Jason to help me put it back together!

And yes, I do want to borrow your gun. You headed this way anytime soon?

barn9 · 05-08-2003, 11:33 AM

No plans, but we can make some, lol!! If you are going to start the body work, sanding, etc., we might work something out to meet at Chuck's house in Belle Plaine, and he would be glad to give/show you some helpful info. You've gone this far, we might as well do it right, hehee! We'll just make that ol' truck shine like the grin you're gonna be wearin' when you get behind the wheel!

Mudder · 05-08-2003, 11:41 AM

You better start saving for some gas money cause I bet your wife will never get you out of that hing once you get it all finished.

**Yukon Jack** · 05-08-2003, 04:31 PM

Ya know, daily driver does have a nice ring to it, don't it!

BigDaddyCMU · 05-08-2003, 07:41 PM

Hey Yukon, just wanted to say I like the big block. I just built one exactly like it! I love those GM valve covers. They look great on a black motor with the aluminum intake. Unfortunately, it'll be a while before I get to bolt it in. It sure looks good on the stand though.

BLAZERMAN · 05-08-2003, 08:09 PM

LOOKING GOOD!!

casey · 05-08-2003, 09:13 PM

holy krykees that looks sweet yukon jack

**68 Stepside** · 05-08-2003, 09:15 PM

You aren't done yet?

Looking good Mark

breeh · 05-09-2003, 01:19 AM

That looks great! I am still curious to see how you get the exhaust bent around the transfer case. In the pics it looks like the headers are pointing right at the crossmember with maybe 8 inches to work with. I will be following this with interest as I am considering doing the same thing.

**Yukon Jack** · 05-09-2003, 09:30 AM

68 Stepside - how did I know you were gonna say that! I definitely am slow aren't I.

Breeh, the exhaust looks like it should be a piece of cake - with the first set of headers, it never would have worked, but I'm pretty confident that with these it will be fine. I'll definitely post more pics, seeings how I'm a bit of a pic whore :-)

breeh · 06-01-2003, 01:42 AM

Hey Yukon, I was looking at your pics again and was wondering if you think that a stock clutch lingage would work with those headers?

05-08-2003, 09:56 AM	#1
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,686	Pics of my headers installed and info about fitment issues Here are some pics of my headers now that they are installed and fitted. This is on my 69 with a 454. These headers are Dynomax Cermacoated headers designed for the 67-87 BBC 2WD. The headers for 73-87 BBC 4WD would not work. The engine is sitting in the small block engine crossmember using the original small block style engine mounts. I did move the crossmember forward about 3/8" or so to give me better oil pan clearance and header clearance for the first header tube on the passenger side. To make these headers fit I did not have to make any modifications to the driver's side other than I did have to go with a shorter oil filter as this engine has an oil cooler setup which put the larger oil filter in contact with the headers. On the passenger side I had to remove a little bit of frame to give clearance for the first and second header tubes. I would guess I removed about 1/4". I also ended up grinding off a little bit of the engine crossmember tower as it was in contact with the bottom of the first header tube. In the end I had to use some spacers that I put between the engine and the engine mount bolts to raise the engine a bit on the passenger side and I also raised the drivers side by using spacers about half as big. The above modifications have me comfortable with the clearance around the oil pan and passenger side headers. I will go ahead and post a number of pics showing how the headers sit in the frame and how they are positioned in regards to the Rockwell transfer case as I hope this will be of interest to others who are doing a big block swap in a 67-72 four wheel drive. First pic is overview of drivers side. Attached Images __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

05-08-2003, 09:56 AM	#2
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,686	This pic is of the driver side collector. Attached Images __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

05-08-2003, 09:57 AM	#3
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,686	Here's a pic again of the drivers side from behind the transfer case. Attached Images __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

05-08-2003, 09:58 AM	#4
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,686	This pics shows how low the driver side collector sits. Attached Images __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

05-08-2003, 09:59 AM	#5
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,686	Here is a pic of the passenger side collector. Did have to grind down the bolt on the lower shackle. Attached Images __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

05-08-2003, 10:00 AM	#7
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,686	Here's how low the passenger side collector sits. Attached Images __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

05-08-2003, 10:01 AM	#8
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,686	Here's a pic from in front of the engine showign the header pipes. Attached Images __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

05-08-2003, 10:01 AM	#9
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,686	Pic of the passenger side headers. Attached Images __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

05-08-2003, 10:10 AM	#10
griesel72 Senior Member Join Date: Apr 2003 Location: Howard, Kansas USA Posts: 1,997	me likes!!!!!!!!! Leave it to a good ol Kansas boy to build a bad a$$ machine keep us up on it david __________________ 1969 K10 Custom 10 1997 Z71 2006 Volkswagen Jetta TDI 2006 King Ranch 1980 Wife

05-08-2003, 10:47 AM	#11
1970 CST Short Wide Senior Moment Join Date: Mar 2002 Location: Pittsburg Ca Posts: 4,185	Lookin Good Yukon. When you going to make some Smoke with that Bad Boy. __________________ 1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565

05-08-2003, 10:59 AM	#12
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,686	A buddy is doing rust repairs on my cab and I should have it back maybe this weekend. Then I get to learn body work and paint - gonna do that myself for some ungodly reason - what am I thinking? So to answer your question, I have no idea - probably a month later than I think :-) __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

05-08-2003, 11:15 AM	#13
barn9 Half a bubble off! Join Date: Jun 2000 Location: Winfield, Ks, USA Posts: 5,588	Lookin' good Mark! It needs to be done by June 22nd, lol!! Do you still want to use my HVLP gun? __________________ Just call me LB. '71 Cheyenne, 402BB, hauls blondes, brunettes, or redheads.

05-08-2003, 11:16 AM	#14
Riveted1 Tasty Cakes! Join Date: Apr 2003 Location: Gilbert, AZ Posts: 2,112	Man, that looks sweeeeeet! Makes me wanna go w/a big block! __________________ I'm a little and a lot Ground beef: A cow with no legs. ---------------- '66 Chevy SWB "Penny" '67 Chevy Big Window SWB- aka "Pearl" '72 Burb- "Betty" "It's not a hearse dammit" '99 Chevy Ext. cab Silverado

05-08-2003, 11:17 AM	#15
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,686	I know! I'm sweating bullets at this point. Can I have it done - or more correct - can WE have it done. Cause I know I'm gonna enlist you and Jason to help me put it back together! And yes, I do want to borrow your gun. You headed this way anytime soon? __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

05-08-2003, 11:33 AM	#16
barn9 Half a bubble off! Join Date: Jun 2000 Location: Winfield, Ks, USA Posts: 5,588	No plans, but we can make some, lol!! If you are going to start the body work, sanding, etc., we might work something out to meet at Chuck's house in Belle Plaine, and he would be glad to give/show you some helpful info. You've gone this far, we might as well do it right, hehee! We'll just make that ol' truck shine like the grin you're gonna be wearin' when you get behind the wheel! __________________ Just call me LB. '71 Cheyenne, 402BB, hauls blondes, brunettes, or redheads.



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05-08-2003, 11:41 AM	#17
Mudder Registered User Join Date: Feb 2001 Location: East Central, MO Posts: 11,336	You better start saving for some gas money cause I bet your wife will never get you out of that hing once you get it all finished.

05-08-2003, 04:31 PM	#18
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,686	Ya know, daily driver does have a nice ring to it, don't it! __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

05-08-2003, 07:41 PM	#19
BigDaddyCMU Registered User Join Date: Oct 2002 Location: Memphis, MI Posts: 136	Hey Yukon, just wanted to say I like the big block. I just built one exactly like it! I love those GM valve covers. They look great on a black motor with the aluminum intake. Unfortunately, it'll be a while before I get to bolt it in. It sure looks good on the stand though.

05-08-2003, 08:09 PM	#20
BLAZERMAN Currently Blazerless Join Date: Apr 2000 Location: St. Joseph Mo. Posts: 4,828	LOOKING GOOD!! __________________ 1972 C/30 133" W.B. C&C 1970 GMC 3500 157" W.B. single wheel C&C

05-08-2003, 09:13 PM	#21
casey Registered User Join Date: Jan 2003 Location: Kelowna B.C. Canada Posts: 2,048	holy krykees that looks sweet yukon jack

05-08-2003, 09:15 PM	#22
68 Stepside huh? Join Date: May 2000 Location: Washington, Illinois Posts: 5,690	You aren't done yet? Looking good Mark __________________ Someday when I'm lonely, Wishing you weren't so far away, Then I will remember Things we said today. RIP El Jay

05-09-2003, 01:19 AM	#23
breeh Recovering 67-72 Addict Join Date: Oct 2000 Location: North Bend, WA Posts: 1,788	That looks great! I am still curious to see how you get the exhaust bent around the transfer case. In the pics it looks like the headers are pointing right at the crossmember with maybe 8 inches to work with. I will be following this with interest as I am considering doing the same thing. __________________ 68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women"

05-09-2003, 09:30 AM	#24
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,686	68 Stepside - how did I know you were gonna say that! I definitely am slow aren't I. Breeh, the exhaust looks like it should be a piece of cake - with the first set of headers, it never would have worked, but I'm pretty confident that with these it will be fine. I'll definitely post more pics, seeings how I'm a bit of a pic whore :-) __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

06-01-2003, 01:42 AM	#25
breeh Recovering 67-72 Addict Join Date: Oct 2000 Location: North Bend, WA Posts: 1,788	Hey Yukon, I was looking at your pics again and was wondering if you think that a stock clutch lingage would work with those headers? __________________ 68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women"

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