Ive got a 305 for sale with very low miles. has Eagle I-beam rods, KB 10:1 pistons (with 58cc heads) comp cams XE256 hyd cam, it is a i piece rear manin block. should be pulled apart & cleaned up before use. also have a pair of L-98 aluminum H.O. vette heads that were on the 305 with self aligning roller tip rockers & flamed centerbolt valve covers.thought there was a knock in the engine... turns out it was a serious header leak. heads have D shaped exhaust ports & the Dynomax headers I had were oval
turns out the engine is fine,,, it ran very strong in my 86 Elcamino with 3.08 gear. John