4.150 stroke x 4.380 bore. Filled block. -1's 345cc ported by Ken Lazzurus. Cat H beams, 440Source domed pistons. Herbert roller Chevy grind. 267/274 @ .050". .765"/.715" with Jesel 1.7 rockers. TRE manifold with modified 850's and ThumperCarb tune. 2 1/8" headers with 4" collectors. Ram clutch, Nash 5 speed, Long vertigate. 4.10's with 14 x 32's but enough room for 16's if they don't stick.