Want to see some pics of 69-72 blazers with big blocks!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Sweet72k5 · 05-30-2005, 01:41 AM

I just wanted to see some pics of the engine compartment with the big block in and what mods where made with the fire wall!!!

6772king · 05-30-2005, 10:19 AM

here's mine I didnt do anything to my firewall ,,,I just moved everything up

**Yukon Jack** · 05-30-2005, 10:20 AM

Here's a link to info on my swap in my K20, won't be any different than a K5. I had major issues, should have moved it all forward like 6772king.

454 swap info

Roberty · 05-30-2005, 07:30 PM

Quote:

Originally Posted by Sweet72k5

I just wanted to see some pics of the engine compartment with the big block in and what mods where made with the fire wall!!!

Unless you go with a set of tall valve covers, I was under the impression that putting a big block in one of our trucks was fairly straightfoward - assuming that you use the big block engine towers. Are the people running into major clearence problems using the stock small block towers or something??

Sweet72k5 · 05-30-2005, 08:15 PM

this is the big block iam putting in i have all the mounts for it and they are the tall valve covers but i can change them out to the smaller ones are plasma cut the fire wall to make it fit and redo some of the sheet metal on the fire wall but if i can avoid messing with the fire wall i will try not to mess with it..

bobshotrodblazer · 05-30-2005, 08:16 PM

If use the Big Block motor mounts you will have alot less hassle . You can use tall valve covers also. I put a 396 1n a 72 2wd blazer. I used shorty hedman chevelle headers .it worked out well.

Sweet72k5 · 05-30-2005, 08:18 PM

as well the motor thats in it now is a 327 and even with that motor the valve cover clear not by much but they are the tall valve covers for a small block..

Sweet72k5 · 05-30-2005, 08:21 PM

very cool to now well will see how she goes going to start the trans plant next week and iam putting the 327 in my dirt track race car..

orangeuavol · 05-30-2005, 09:15 PM

cut firewall for valve cover clearance.

http://pg.photos.yahoo.com/ph/jason_...28.jpg&.src=ph

http://pg.photos.yahoo.com/ph/jason_...38.jpg&.src=ph

http://pg.photos.yahoo.com/ph/jason_...42.jpg&.src=ph

Big Bad 1972 Blazer · 05-31-2005, 09:39 PM

Here's a pic of my 496 sitting in the engine bay

. I've got it in the stock location and am running tall valve covers. I ran into MAJOR clearance issues with the firewall on both sides of the block...no mere dimples would have cured my problems. I cut out the interferance areas, created "pocks out of sheet metal and welded them back in. To give you an idea as to how much of an interferance I had...on the driver's side, I actually had to cut the hole for the clutch rod out. Fortuantely, I had to blow a new hole through the dash for the clutch set-up that I'm running...otherwise I'd really been S.O.L.!

**Yukon Jack** · 06-01-2005, 12:18 PM

Big Bad 1972 Blazer - sounds like you had to make mods similar to mine.

My drivers side is still tighter than I would have wanted.

Burt4x4 · 06-01-2005, 02:42 PM

I put a 454 in my 72:

This last pic you can see were I had to BAM BAM on the firewall.
I also used a 73+ truck SBC crossmember to replace my factory 72 one. The two main reasons for this is, so I can remove the oil pan with out the Xmember being in the way and so I could use aftermarket SBC engine mounts for a more ridged mounting to the frame.
You can see the crossmember here:

I just got back from a weekend at Pismo Dunes with my K5....WOW I love 454 power. AWSOME!!! This engine ROCKED my K5 and it was so easy to climb the dunes...
Burt

shelby987 · 06-02-2005, 02:57 PM

I came across a 1972 blazer in Texas that was for sale a little while back, the owner claimed that it was original.....is this correct? This thread makes me wonder....did the blazers ever come with big blocks (396 specifically) as a factory option?

Thanks,

Alexis · 06-02-2005, 03:03 PM

Quote:

Originally Posted by shelby987

I came across a 1972 blazer in Texas that was for sale a little while back, the owner claimed that it was original.....is this correct? This thread makes me wonder....did the blazers ever come with big blocks (396 specifically) as a factory option?

Thanks,

nope

Roberty · 06-02-2005, 09:52 PM

Quote:

Originally Posted by shelby987

I came across a 1972 blazer in Texas that was for sale a little while back, the owner claimed that it was original.....is this correct? This thread makes me wonder....did the blazers ever come with big blocks (396 specifically) as a factory option?

Thanks,

I would think that if it were a 2 wheel drive Blazer then it might have been but I'm not 100% sure on that. If it was a 4x4 Blazer then nope.

shelby987 · 06-03-2005, 08:34 AM

lol, kinda wondered about that.....he was asking for 8 grand for it.....and stated that if it were in original condition it would be worth double that (rust free body, but no top, roll bar, seats, and needed paint and other odds and ends). Thought I had found something rare.....guess the joke was on me.....but I didn't buy so....guess the joke could have been funnier!
Thanks,

05-30-2005, 01:41 AM	#1
Sweet72k5 Registered User Join Date: Apr 2005 Location: Oregon Posts: 53	Want to see some pics of 69-72 blazers with big blocks!! I just wanted to see some pics of the engine compartment with the big block in and what mods where made with the fire wall!!!

05-30-2005, 10:19 AM	#2
6772king Registered User Join Date: Feb 2002 Location: grove city pa usa Posts: 628	here's mine I didnt do anything to my firewall ,,,I just moved everything up Attached Images __________________ 67 chevy short step 2wd 427 71 chevy short fleet 4x4 396 72 gmc jimmy 2wd 377 71 chevy blazer 4x4 454 69 chevy longhorn 5.9l cummins 72 chevy 400 2wd custom camper 67 chevy lwb 4x4 454-in pieces 67 chevy panel soon 4x4-400 67 gmc dump 4x4 1 ton-305 WTF!! 72 chevy 3/4 ton 4x4 burb 350 70 chevy panel 2wd 302 5 speed tko "THERE IS NO REPLACMENT FOR DISPLACMENT"!!!!!!!

05-30-2005, 10:20 AM	#3
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,684	Here's a link to info on my swap in my K20, won't be any different than a K5. I had major issues, should have moved it all forward like 6772king. 454 swap info __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

05-30-2005, 08:15 PM	#5
Sweet72k5 Registered User Join Date: Apr 2005 Location: Oregon Posts: 53	this is the big block iam putting in i have all the mounts for it and they are the tall valve covers but i can change them out to the smaller ones are plasma cut the fire wall to make it fit and redo some of the sheet metal on the fire wall but if i can avoid messing with the fire wall i will try not to mess with it.. Attached Images

05-30-2005, 08:16 PM	#6
bobshotrodblazer BigBlockBobby Join Date: Mar 2004 Location: Lake Worth, Florida Posts: 740	If use the Big Block motor mounts you will have alot less hassle . You can use tall valve covers also. I put a 396 1n a 72 2wd blazer. I used shorty hedman chevelle headers .it worked out well. __________________ Bob

05-30-2005, 08:18 PM	#7
Sweet72k5 Registered User Join Date: Apr 2005 Location: Oregon Posts: 53	as well the motor thats in it now is a 327 and even with that motor the valve cover clear not by much but they are the tall valve covers for a small block..

05-30-2005, 08:21 PM	#8
Sweet72k5 Registered User Join Date: Apr 2005 Location: Oregon Posts: 53	very cool to now well will see how she goes going to start the trans plant next week and iam putting the 327 in my dirt track race car..

05-30-2005, 09:15 PM	#9
orangeuavol GO VOLS! Join Date: May 2001 Location: Knoxville, TN Posts: 725	mine. cut firewall for valve cover clearance. http://pg.photos.yahoo.com/ph/jason_...28.jpg&.src=ph http://pg.photos.yahoo.com/ph/jason_...38.jpg&.src=ph http://pg.photos.yahoo.com/ph/jason_...42.jpg&.src=ph __________________ http://1972blazer.shutterfly.com/<= blazer build pics It's called golf because all the other four letter words were taken. It's easier to ask for forgiveness than for permission.

05-31-2005, 09:39 PM	#10
Big Bad 1972 Blazer Registered User Join Date: Jan 2005 Location: Armada, MI 48188 Posts: 83	Here's a pic of my 496 sitting in the engine bay . I've got it in the stock location and am running tall valve covers. I ran into MAJOR clearance issues with the firewall on both sides of the block...no mere dimples would have cured my problems. I cut out the interferance areas, created "pocks out of sheet metal and welded them back in. To give you an idea as to how much of an interferance I had...on the driver's side, I actually had to cut the hole for the clutch rod out. Fortuantely, I had to blow a new hole through the dash for the clutch set-up that I'm running...otherwise I'd really been S.O.L.!

06-01-2005, 12:18 PM	#11
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,684	Big Bad 1972 Blazer - sounds like you had to make mods similar to mine. My drivers side is still tighter than I would have wanted. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14 Last edited by Yukon Jack; 06-01-2005 at 12:18 PM.

06-01-2005, 02:42 PM	#12
Burt4x4 Registered User Join Date: Feb 2000 Location: Modesto, CA Posts: 1,842	I put a 454 in my 72: This last pic you can see were I had to BAM BAM on the firewall. I also used a 73+ truck SBC crossmember to replace my factory 72 one. The two main reasons for this is, so I can remove the oil pan with out the Xmember being in the way and so I could use aftermarket SBC engine mounts for a more ridged mounting to the frame. You can see the crossmember here: I just got back from a weekend at Pismo Dunes with my K5....WOW I love 454 power. AWSOME!!! This engine ROCKED my K5 and it was so easy to climb the dunes... Burt __________________ 1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks

06-02-2005, 02:57 PM	#13
shelby987 Registered User Join Date: Mar 2005 Location: Just outside Durham, NC Posts: 894	I came across a 1972 blazer in Texas that was for sale a little while back, the owner claimed that it was original.....is this correct? This thread makes me wonder....did the blazers ever come with big blocks (396 specifically) as a factory option? Thanks,

06-03-2005, 08:34 AM	#16
shelby987 Registered User Join Date: Mar 2005 Location: Just outside Durham, NC Posts: 894	lol, kinda wondered about that.....he was asking for 8 grand for it.....and stated that if it were in original condition it would be worth double that (rust free body, but no top, roll bar, seats, and needed paint and other odds and ends). Thought I had found something rare.....guess the joke was on me.....but I didn't buy so....guess the joke could have been funnier! Thanks,



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