33417369...90-up...350..........Gen.I Goodwrench crate motor,"Hecho en Mexico", 76cc
Placing these on a 305 would be a big mistake. The 76cc chamber will lower the 305`s compression ratio down to about 6:1 and it won`t have enough power to spin on ice. The 305 uses heads that have a 58cc and smaller chamber due to the 305`s small 3.736 bore. 305 heads are common at junkyards and machine shops, finding a set in good shape cheap should be rather easy. The 369 heads best place is the scrap pile.