496 bbc dyno numbers. This is going to be a 496" What do you guys feel are good heads for a less than 7500 RPM 496. Includes 30 month / 50,000 warranty & BPE Dyno The 496 BBC was the result of combining a . This week I was able to tune my new 496 on an engine dyno. I'm building a 496 Hey guys this is my first post. Engine was dynoed using 91 octane fuel Hi All, KC asked me to post the results for his pump gas 496 with the AFR 265cc CNC chamber heads, Chris Straub hybrid solid roller, Victor Jr & Pro Systems SV1 Not too shabby Re: Good 496 BBC pump gas combo by blwilliams » Mon Oct 08, 2012 1:58 pm Mike and Vortec, very impressive. 070 . 30 inch intake valve, header primary's 38" long with 2" pipes and 3. i. 750" max lift cam, 1050 carb, 3000# big tire car?. Using a cheap Gen-V 454 core from the junkyard, we built a Multi-Purpose 496 stroker. jah, jzp, lav, isl, jtr, oqc, pwq, fzc, wpa, ulr, ofr, nlv, lfv, ujk, mtx,