a 983 GMC used to be a tandem axel
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Don't think so if you take them out of a LTD or Town Car.
And replace those peanut port heads!
I'm deep off into a 520 inch boss top end to give that foundation some breathing room.
What kinda torque did something like this have Don? That’s a lot of mass moving and likely bigger pistons than the Zephyr V12 flathead?
62BillT
Well Known Member
A GMC 702 V-12 is like 2 351 V-6's stuck together. The specs for the 702, like the pistons for example were like the 351. The Heads were also the same.
I used to drive both a 478 V-6 and a 637 V-8. Interestingly the 637 was like a 478 with 2 extra cylinders welded on, also cubic inch wise. But just as looks go and cubic inches go. On the inside they were very different. The 478 was a lugger, full of torque like a Mack. The 637 was a revver like a Detroit.
I used to drive both a 478 V-6 and a 637 V-8. Interestingly the 637 was like a 478 with 2 extra cylinders welded on, also cubic inch wise. But just as looks go and cubic inches go. On the inside they were very different. The 478 was a lugger, full of torque like a Mack. The 637 was a revver like a Detroit.
Technically its a 400 pound man trying to exhale thru a straw since the BBF intake port is more than capable even in the non-CJ versions,and once you do a little easy porting on the exhaust port they make plenty of power.The carbureted version of 460 was never saddled with a peanut port head unike every 454 from the mid 70's to the mid 90's,when they went to efi at the end of the 80's they did decrease the size of the ports some but it still wasn't as small as the 454 peanuts.As far as weight my engine hoist strains equally hard for BBC's as it does for BBF's.Its kind of like a fat guy calling a fat guy fat.
Is that with Kaase heads?I'm deep off into a 520 inch boss top end to give that foundation some breathing room.
Yes it is, 521 inch 460 block for the base.
I don't care if ya'll are chevy guys that is engine porn.