3973487X sbc head question......again - The 1947 - Present Chevrolet & GMC Truck Message Board Network

lux hauler · 04-18-2002, 05:05 PM

OK.....these are the heads that are on my 72 now. As you all probably know, I am going to get the motor rebuilt soon. Should I have these heads rebuilt or go with the Vortecs?
Is this a good casting? Are they good heads?

I have seen different sites that say different things about them. Some say they have 1.94" valves, some say 2.02" valves. Anyone know for sure or did they make these heads with both sizes?

Here is the info that I got from one site:

3973487X....75cc....2.02....1.60....1971-72 350

04-18-2002, 05:05 PM	#1
lux hauler Psycho-billy Member Join Date: Jul 2001 Location: about 40 miles west of Cleveland, Ohio Posts: 2,591	3973487X sbc head question......again OK.....these are the heads that are on my 72 now. As you all probably know, I am going to get the motor rebuilt soon. Should I have these heads rebuilt or go with the Vortecs? Is this a good casting? Are they good heads? I have seen different sites that say different things about them. Some say they have 1.94" valves, some say 2.02" valves. Anyone know for sure or did they make these heads with both sizes? Here is the info that I got from one site: 3973487X....75cc....2.02....1.60....1971-72 350 __________________ '72 C-10 350 w/Lunati Voodoo cam (207/213, .437/.454), Performer intake, 625 Road Demon Jr. and Hooker headers. Support your community, support yourself. Buy local, buy American (or Canadian).



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