another 350 to 454 swap question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**bigunde** · 11-23-2004, 05:05 PM

just out looking at my 70 and noticed the clutch linkage that goes from the frame to the block.will this still work for the 454?

**JIMs70GMC** · 11-23-2004, 07:00 PM

The one ton I just bought had a big block with headers and an SM465. PO pulled the 427 and I noticed the linkeage through the fire wall had been modified. But the z bar was in the correct location.

**bigunde** · 11-23-2004, 07:29 PM

heya jim,does that mean it bolts to the same location of the block as the small block?

**JIMs70GMC** · 11-24-2004, 07:28 AM

I'm going to say yes as the guy had the 427 sitting on the 350 mounts/stands.

Nick's683/4 · 11-24-2004, 06:42 PM

I was trying to find out the samthing and jerry moss told me that it wont and you have to make a new spot for it to mount.

**bigunde** · 11-24-2004, 07:58 PM

i had my buddy at the chevrolet dealership look up the z bar for those years and it says one number for all engines.

4x4Poet · 11-28-2004, 12:20 PM

It's not the z-bar that's differnet between engines, it the length of the rod from clutch pedal to z-bar determined by the frame location of the z-bar bracket, the location of which is determined by the original engine installed. IIRC, 6 cyl have different bracket locations. Yup, come to think of it, I've seen a few wrecked 67-72 6 cyl trucks with the z-bar bracket mounted father forward.

Brainchild · 11-28-2004, 05:01 PM

Quote:

Originally Posted by 4x4Poet

It's not the z-bar that's differnet between engines, it the length of the rod from clutch pedal to z-bar determined by the frame location of the z-bar bracket, the location of which is determined by the original engine installed. IIRC, 6 cyl have different bracket locations. Yup, come to think of it, I've seen a few wrecked 67-72 6 cyl trucks with the z-bar bracket mounted father forward.

Yup if you move the engine to the original V8 position you'll have to move the Zbar too.

**BAD4X4** · 11-28-2004, 02:51 PM

You must make sure the block has the hole up front of the oil filter, to spin in the ball for the z-bar. My new 2004 454 I had built by chevrolet didn't have the hole so I had to go with a new 63-67 corvette style set up that skog and dickie sell. Hope this helps.

**bigunde** · 11-28-2004, 05:03 PM

i did notice when i put the big block frame towers in there are no bolt holes already drilled at the bottom.the top lines up fine.

11-23-2004, 05:05 PM	#1
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	another 350 to 454 swap question just out looking at my 70 and noticed the clutch linkage that goes from the frame to the block.will this still work for the 454? Last edited by bigunde; 11-23-2004 at 05:06 PM. Reason: TYPED WRONG

11-23-2004, 07:00 PM	#2
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	The one ton I just bought had a big block with headers and an SM465. PO pulled the 427 and I noticed the linkeage through the fire wall had been modified. But the z bar was in the correct location. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

11-24-2004, 07:28 AM	#4
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	I'm going to say yes as the guy had the 427 sitting on the 350 mounts/stands. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

11-24-2004, 06:42 PM	#5
Nick's683/4 Registered User Join Date: Apr 2004 Location: Oakley CA Posts: 165	I was trying to find out the samthing and jerry moss told me that it wont and you have to make a new spot for it to mount. __________________ 70 1 ton with a 454 and a 4 speed and a np205

11-28-2004, 12:20 PM	#7
4x4Poet Registered User Join Date: Nov 2004 Location: "Under Montana skies." Posts: 1,836	It's not the z-bar that's differnet between engines, it the length of the rod from clutch pedal to z-bar determined by the frame location of the z-bar bracket, the location of which is determined by the original engine installed. IIRC, 6 cyl have different bracket locations. Yup, come to think of it, I've seen a few wrecked 67-72 6 cyl trucks with the z-bar bracket mounted father forward. __________________ '71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup.

11-23-2004, 07:29 PM	#3
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	heya jim,does that mean it bolts to the same location of the block as the small block?

11-24-2004, 07:58 PM	#6
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	i had my buddy at the chevrolet dealership look up the z bar for those years and it says one number for all engines.

11-28-2004, 02:51 PM	#9
BAD4X4 Senior Member Join Date: Jan 2003 Location: La pine Oregon Posts: 1,668	You must make sure the block has the hole up front of the oil filter, to spin in the ball for the z-bar. My new 2004 454 I had built by chevrolet didn't have the hole so I had to go with a new 63-67 corvette style set up that skog and dickie sell. Hope this helps. __________________ 1972 Cheyenne K-30 6"lift {502 PROJECT} 1972 Cheyenne K-30 8"lift 454 450hp {Ol'Blue} 1972 Cheyenne K-20 Custom Stretch 6" lift 454 1972 Custom Deluxe K-20 4" lift 2007 GMC Crew Cab Diesel 6"lift {The Tow Rig 2017 Ford F-350 Crew Cab 6.7 6"lift (Wife's) 1977 El Camino SS Grandpa baught new 1986 K-30 Crew Cab 502 1955 Chevy 2-Door gasser 454 550hp{project} 1956 Chevy Bel-Air 2-Door hardtop 572 700hp 1979 Ford F-350 All Original 4x4 (Wife's)

11-28-2004, 05:03 PM	#10
bigunde Rusty Rockerfeller Join Date: May 2003 Location: South Georgia Posts: 1,631	i did notice when i put the big block frame towers in there are no bolt holes already drilled at the bottom.the top lines up fine.



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