350 interchange question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Bus Ted Knuckle · 03-22-2007, 10:25 AM

One quick question about 350's:

will a 1972 intake manifold fit on a 1987-1992 long block?

Thanks in advance!
Bill

martinkh · 03-22-2007, 10:39 AM

I think you could not use the new style alt bracket, maybe some others.
Honestly, unless it is a sweet manifold, you are better off buying a modern one, you will get better power and milage.

Tx Firefighter · 03-22-2007, 10:48 AM

Yes, they work fine. You'll need to slightly enlongate the two center intake bolt holes on each side of the manifold. If you'll notice, the later heads have the two center bolts on each side at a more vertical angle than the earlier heads.

If you'll search, I've posted pics on here before of an intake that I did it to. Only takes a second to do the grinding.

03-22-2007, 10:25 AM	#1
Bus Ted Knuckle Son of a gun Join Date: Jan 2007 Location: Hot Springs, Arkansas Posts: 1,636	350 interchange question One quick question about 350's: will a 1972 intake manifold fit on a 1987-1992 long block? Thanks in advance! Bill

03-22-2007, 10:39 AM	#2
martinkh Registered User Join Date: Mar 2007 Location: Boise Posts: 107	Re: 350 interchange question I think you could not use the new style alt bracket, maybe some others. Honestly, unless it is a sweet manifold, you are better off buying a modern one, you will get better power and milage. __________________ '70gmc 3/4ton 4X4, re-arch and 2" add-a-leaf lift. '77 400sbc, '82 axles, d60front, 14bolt rear. Probably some 285/75/16 Toyo m/t's on my stock rims coming up.

03-22-2007, 10:48 AM	#3
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: 350 interchange question Yes, they work fine. You'll need to slightly enlongate the two center intake bolt holes on each side of the manifold. If you'll notice, the later heads have the two center bolts on each side at a more vertical angle than the earlier heads. If you'll search, I've posted pics on here before of an intake that I did it to. Only takes a second to do the grinding. __________________ I'm on the Instagram- @Gearhead_Kevin



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