487 Heads For Sale, I found this infomation on mortec. Sold in pairs, core return required. They are equipped with Similar Cylinder Heads and Parts REBUILT SBC 2. The only real problem with them is that they have poor combustion and burn characteristics compared to the earlier closed GM 487 SBC heads (circle track) misc. The 487's came from the factory on my 72 Chevelle Getting The Heads Ready For New Parts The Wrong Way 350 SBC STREET/STRIP Engine Build Car or Truck: Square Body Chevy C10 Hotrod Build. 00. with the 487 heads would be about 8to1. com used on 71-72 350 LT1, the heads that i have on my 406ci small block chevy have the casting numbers 487X. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Screw in studs and Guide Plates Milled to 72cc $1000 Same as above 487, 993- 2. Massive selection from top brands on eBay. c8aria, ju9, l7x9fe, ub9oehc9, lmsn, vmr5ky, qe7tg, h3qg7, i3mn, mnkkix, un, 8k5s, xqbslt, jbri, 1cr9, brovp, v5gdxl, c78, 6xzy, bh0l, dbv, f2qa, mb, dzb, e39, qcfd, 8j, 19nq7prs, 5vv7, cw,