more engine swap woes - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**bigunde** · 11-27-2004, 05:29 PM

well im test fitting the 454 in my 70 and now the manifold on the drivers side is wrong.it is dumping at the z-bar.the number on it is 3994045.anyone have the correct one or a correct set.?

**bigunde** · 11-27-2004, 06:09 PM

just seen a set for a 71 on ebay and it looks like the drivers dump straight down too.what gives????????

Harold Shepard · 11-27-2004, 08:03 PM

Was your truck a six cylinder previously? It looks like the z-bar is too far forward. If you look at your block above the oil filter pad there is another hole, the z-bar should bolt there, which means if you have six cylinder clutch parts- push rod, it won't work unless you find a manifol from a later truck or car that dumps like the passenger side. 3994045 is the correct # for the manifold and this application.

**bigunde** · 11-27-2004, 08:08 PM

it was originally a 6 but we just pulled the 350 out of it and the clutch worked fine.im hearing i need to get the linkage out of a 75 and later truck and relocate it to the back drivers side side of the block

Harold Shepard · 11-27-2004, 08:09 PM

Reason I ask about the six, looks like the 350 was located in the six position- back two holes in the frame- and that has the z-bar location off. Check your vin and see if it has CS or CE at the beginning of the numbers to determine- S = six E=eight

**bigunde** · 11-27-2004, 08:13 PM

the truck was originaly a 6,when i got it it already had the 350 and the z -bar ball was mounted forward of the oil filter not at that rear hole

**JDL** · 11-28-2004, 01:06 AM

This might help

Harold Shepard · 11-28-2004, 01:10 AM

You don't need linkage from another year, just the clutch rod (part coming down through the hole from clutch pedal). You will have to move the z-bar back to line up with the pivot point on the block. You can get away with the SB mounted in that position due to the configuration of the manifold, the big block moves the collector further back and hits right where you currently have the z-bar. Remember, you are crossing components from two different animals, while there are some things you can fudge for a 6 to sb, the bb requires the movement of parts to line up correctly. Unless you can find a manifold off of some car w/bb I do not think you can use what you have in the present configuration. Good time for and automatic and then no problems

**bigunde** · 11-28-2004, 08:41 AM

Thanks Harold,looks like i need to get back to work on that rascal.Id like to keep the 4 speed in it if i can.

11-27-2004, 05:29 PM	#1
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	more engine swap woes well im test fitting the 454 in my 70 and now the manifold on the drivers side is wrong.it is dumping at the z-bar.the number on it is 3994045.anyone have the correct one or a correct set.? Attached Images Last edited by bigunde; 11-27-2004 at 05:49 PM.

11-28-2004, 01:06 AM	#7
JDL Senior Member Join Date: Sep 2000 Location: Agency IA. Posts: 1,839	This might help __________________ 72 Chevy short step side with 454 air and tilt. 72 nova project car 63 chevy II drag car Agency Iowa

11-27-2004, 06:09 PM	#2
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	just seen a set for a 71 on ebay and it looks like the drivers dump straight down too.what gives????????

11-27-2004, 08:03 PM	#3
Harold Shepard Registered User Join Date: May 2004 Location: Canton North Carolina Posts: 466	Was your truck a six cylinder previously? It looks like the z-bar is too far forward. If you look at your block above the oil filter pad there is another hole, the z-bar should bolt there, which means if you have six cylinder clutch parts- push rod, it won't work unless you find a manifol from a later truck or car that dumps like the passenger side. 3994045 is the correct # for the manifold and this application.

11-27-2004, 08:08 PM	#4
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	it was originally a 6 but we just pulled the 350 out of it and the clutch worked fine.im hearing i need to get the linkage out of a 75 and later truck and relocate it to the back drivers side side of the block

11-27-2004, 08:09 PM	#5
Harold Shepard Registered User Join Date: May 2004 Location: Canton North Carolina Posts: 466	Reason I ask about the six, looks like the 350 was located in the six position- back two holes in the frame- and that has the z-bar location off. Check your vin and see if it has CS or CE at the beginning of the numbers to determine- S = six E=eight

11-27-2004, 08:13 PM	#6
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	the truck was originaly a 6,when i got it it already had the 350 and the z -bar ball was mounted forward of the oil filter not at that rear hole

11-28-2004, 01:10 AM	#8
Harold Shepard Registered User Join Date: May 2004 Location: Canton North Carolina Posts: 466	You don't need linkage from another year, just the clutch rod (part coming down through the hole from clutch pedal). You will have to move the z-bar back to line up with the pivot point on the block. You can get away with the SB mounted in that position due to the configuration of the manifold, the big block moves the collector further back and hits right where you currently have the z-bar. Remember, you are crossing components from two different animals, while there are some things you can fudge for a 6 to sb, the bb requires the movement of parts to line up correctly. Unless you can find a manifold off of some car w/bb I do not think you can use what you have in the present configuration. Good time for and automatic and then no problems

11-28-2004, 08:41 AM	#9
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	Thanks Harold,looks like i need to get back to work on that rascal.Id like to keep the 4 speed in it if i can.



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