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04-28-2016, 08:33 PM
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Registered User
Join Date: Jul 2010
Location: MD
Posts: 1,937
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Re: Frame mounts for Pontiac
Nice. One thing about those 400 blocks. Mid 1975 and up (cast #500577) are "light duty" blocks with thin main webs. No biggie if you do not plan pushing beyond 450-hp or so. Should have the good "6X" heads with big valves & screw in studs though.
__________________
1969 c-10 Step Side Long Bed. I-6 250cid =  = 1969 Pontiac GTO hard top. 400, 4-speed.
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