I know this is not the head you guys are talking about but 73 350's had a 46 head as well. I had a 73 Lemans Sport Coupe 350 with a set of 46's, headers, performer intake and a 3310 vacuum secondary Holley and it ran very well for what it was. If my memory is correct it had screw in studs. This is the only 350P I have ever had but it would sure burn the tires in that big Lemans! I wish I still had that car...
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1969 GTO, 5.77 @ 121 1/8th mile 3450 lbs...535 with Junk dinosaur Eheads
Faster on nitrous…
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