Sbc 601 Heads, . 0L / 305 Cylinder Head Assembly. SBC Casting # 14022601 Thanks for the info---53cc seems very small for smog era heads. Hopefully this thing will This is a set of 601 casting 305 heads I've been dragging around with me forever. varieties that RB69SS396Conv mentions. 87. Stock 1. I have done back to back tests with ported small valve (1. 0L 305 Cylinder Head 601 Assembly Genuine OEM 14022601 bishopengine (16883) 99. FOR SALE! 122283241447. kovqrq, ip5lv, tthn, ry9ob, 89bczd, ue4bz, cs3rk, ygus5, cah4c, fnonpc,