After pulling the olh Holley 600 cfm off my truck its painfull obvious I need to chuck it in the bushes, so what do I put back on my FJ40????? Engine Specs: Chevy 283 cubic inch V-8. It's bored .040" over stock and with 40 over 10.1 : 1 flat top pistons. It has 327 powerpack heads with an Edelbrock performer semi-high rise dual plane intake. The cam is an Ultradyn 284 RV cam - 284 lift 410 duration - Accel HEI high voltage distributer.