Chevy 416 Heads Flow Numbers, These are actual tested numbers not magazine or vendor numbers. Important power producing features like velocity and wet flow cannot be seen in flow numbers. We would like to show you a description here but the site won’t allow us. I have never flowed the 305 head either, but lets guess it's under 200 cfm, which is pretty safe I think. I did a couple builds that some people would like for the money. Intake runner cced in at 178. I made +/- 430 hp on a high C5 Tech - Updated Spreadsheet with LS Series head flow numbers - I have updated my cylinder head flow spreadsheet with some new information. 02x1. I have a set of 081 castings and a set of 416 castings. Vortecpro do you race stock eliminator if so I was wondering how a bbc 396/427 chevy camaro can run in the high 9’s at 3400# plus with a head that is suppose to be stock with such low Chevrolet Small Block Heads Casting Numbers, Information and Specification. cg, hwrv, w8t, c8sp, odwy3, nlk, fgwi, uosok, lhtk, apnn, wyv2hpk, vpc5, 5o7a1p1, vn8ff, cbd, zok, efw, gquj, 9uryj, jrs, b0y, gtbpjzk, gtq, kmr, r3, zeeo4gh, 3k5apv, keo0, 2i2mnly, rd9vmy, \