Valve diameter
Elder User
Joined: Dec 2003
Posts: 655
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From: Miami
I believe they are 1.57 or 1.63 (i forget) intake and 1.46 exhaust. It is the same for 302 and 351 motors in the 80's and 90's unless your talking G.T. 40 heads that came stock on some explorers. To small open them up if ya get a chance, I just put in a set of 1.85 intakes and 1.54 exhaust's in my stock heads after porting and grinding out exhuast bumps and polishing. After I get the truck on the road you guy's will be the first to know how she runs,
She Ain't Revved Ti'll The Rods Are Thrown!
Al
She Ain't Revved Ti'll The Rods Are Thrown!
Al
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