Polyurethane mounts for BB? BB in L6 holes? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68racer · 01-17-2004, 03:38 PM

I am fitting a 502 in place of a 350. At present the 350 is on the original L6 mounts. I like the engine set back. I have a set of original 67-71 big block mounts. They look like they would fit in the L6 position (rear holes). Will this work? Can I get polyurethane mounts to replace the rubber? Can I use the L6 mounts? Will I have any other problems? I don't mind 'adjusting' the cab to fit the engine.

68racer · 01-18-2004, 08:00 AM

c'mon guys, ttt. Figured can't use original BB mounts. Any suggestions? Will stock 6 mounts cope with 500 horsepower?

FRENCHBLUE72 · 01-18-2004, 11:26 AM

I got the 454 sitting in th rear hole's right now with 350 mount's just for mock-up,so ya it fit's..

68racer · 01-18-2004, 03:48 PM

Thanks French, now I need to figure if the ordinary mounts will cope. Can I fit big block pads on I6 mounts? The big block type look stronger as they have a pad on the underneath as well. Also thought about drilling sideways through the stands and fitting later type poly mounts.

01-17-2004, 03:38 PM	#1
68racer Yeah baby! Join Date: Feb 2001 Location: United Kingdom Posts: 436	Polyurethane mounts for BB? BB in L6 holes? I am fitting a 502 in place of a 350. At present the 350 is on the original L6 mounts. I like the engine set back. I have a set of original 67-71 big block mounts. They look like they would fit in the L6 position (rear holes). Will this work? Can I get polyurethane mounts to replace the rubber? Can I use the L6 mounts? Will I have any other problems? I don't mind 'adjusting' the cab to fit the engine. __________________ 11.37 @116

01-18-2004, 08:00 AM	#2
68racer Yeah baby! Join Date: Feb 2001 Location: United Kingdom Posts: 436	c'mon guys, ttt. Figured can't use original BB mounts. Any suggestions? Will stock 6 mounts cope with 500 horsepower? __________________ 11.37 @116

01-18-2004, 11:26 AM	#3
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,606	I got the 454 sitting in th rear hole's right now with 350 mount's just for mock-up,so ya it fit's.. __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

01-18-2004, 03:48 PM	#4
68racer Yeah baby! Join Date: Feb 2001 Location: United Kingdom Posts: 436	Thanks French, now I need to figure if the ordinary mounts will cope. Can I fit big block pads on I6 mounts? The big block type look stronger as they have a pad on the underneath as well. Also thought about drilling sideways through the stands and fitting later type poly mounts. __________________ 11.37 @116

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