Need some help regarding these mythical 72-only big block mounts - The 1947 - Present Chevrolet & GMC Truck Message Board Network

FLYNAVY30 · 10-26-2013, 10:43 AM

Im in the process of swapping an LS1 into my 1972 C20...which originally had the 402 and as Im just learning, some magical, 1 year only, motor mounts....which of course dont match up to any LS swap hardware.

For anyone with experience with these mounts, can I just swap out the 72 perches for 67-71 small block perches so that my LS motor mounts will bolt right up?

Any help would be greatly appreciated.

**Tom Vogel** · 10-26-2013, 10:54 AM

Dont let those 72 BB clamshell mounts go with that BB sale. You could get 200 for those alone.

**FL71C10** · 10-26-2013, 10:55 AM

Those motor mounts are worth good money. You could probably sell them on here and buy some LS conversion motor mounts with the proceeds.

FLYNAVY30 · 10-26-2013, 11:01 AM

yea, it looks like the CPP LS mounts completely eliminate the perch and clam shell, so I may go that route and sell the 72 mounts

Tx Firefighter · 10-26-2013, 08:32 PM

Yes, 67-72 small block frame mounts will bolt right in to the existing holes. They will use three of the four current holes on each side.

10-26-2013, 10:43 AM	#1
FLYNAVY30 Registered User Join Date: Apr 2013 Location: Austin, TX Posts: 592	Need some help regarding these mythical 72-only big block mounts Im in the process of swapping an LS1 into my 1972 C20...which originally had the 402 and as Im just learning, some magical, 1 year only, motor mounts....which of course dont match up to any LS swap hardware. For anyone with experience with these mounts, can I just swap out the 72 perches for 67-71 small block perches so that my LS motor mounts will bolt right up? Any help would be greatly appreciated.

10-26-2013, 10:54 AM	#2
Tom Vogel 2WD Jimmy Join Date: Mar 2005 Location: Davis County, Utah Posts: 2,565	Re: Need some help regarding these mythical 72-only big block mounts Dont let those 72 BB clamshell mounts go with that BB sale. You could get 200 for those alone.

10-26-2013, 10:55 AM	#3
FL71C10 Senior Member Join Date: Jun 2010 Location: Orlando, Florida Posts: 2,509	Re: Need some help regarding these mythical 72-only big block mounts Those motor mounts are worth good money. You could probably sell them on here and buy some LS conversion motor mounts with the proceeds. __________________ 71 Chevy C10 Shortbed Stepside. LT1 with 4l60E. Just got back from painter, in assembly now.

10-26-2013, 11:01 AM	#4
FLYNAVY30 Registered User Join Date: Apr 2013 Location: Austin, TX Posts: 592	Re: Need some help regarding these mythical 72-only big block mounts yea, it looks like the CPP LS mounts completely eliminate the perch and clam shell, so I may go that route and sell the 72 mounts

10-26-2013, 08:32 PM	#5
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: Need some help regarding these mythical 72-only big block mounts Yes, 67-72 small block frame mounts will bolt right in to the existing holes. They will use three of the four current holes on each side.

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