studs are nice...a buddy has them on his 94 lightning. He did it when he rebuilt the shortblock and re-used his gt40 heads, made swapping to AFR185's nice...cept for the brake booster as the angle/way the heads have to come off with studs.
The 351 uses the 1/2 in bolts IIRC, the 302 uses the smaller dia. bolts, dont remember off the top of my head at the moment though on the exact size.