I just took a second look at that ????? 350 with the blower. WHY would a reputable engine builder use heads with press in studs for a blower engine. You would have to think the first time you wound it up you would pull a few of the studs right out just because of the pressure of the ??? roller cam & valve train parts. 75 years of Pontiac engine building , he would have started out on the flat heads, but if he was doing it now could he even pull the torque wrench to tighten the heads because he'd have to be at least 92 years old now. Thats if he started at 17 years old. Just make ya wonder.
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