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Message: <blockquote data-quote="reivaxtorres" data-source="post: 804580" data-attributes="member: 8890">do you have the pistons yet? if not, i would recommend getting a set of NPI spec dished pistons. this will bump up the compression from the factory 9.5:1 to about 10.5:1 (this number varies on who you ask...some say it only gives you 10:1, others say its 10.5:1). on my car, i had the NPI pistons, stock PI heads, stock PI cams, stock PI intake manifold, c&l 75mm plennum/elbow, bbk 75mm throttle body, k&n intake kit, fidanza aluminum 6 bolt flywheel, stock cast iron exhaust manifolds, bbk catted x pipe, magnaflow catback, and i made 270rwhp and 313rwtq, and still passed smog (i live in southern cali). if you are building this engine for the bullitt, i say once you get the original engine out of your car, drop the assembled shortblock/heads into the bullitt and just swap over the bullitt manifold. one of the keys to having the car make power is making the engine as efficient as possible....if you want to get used rods, aim for the earlier NPI rods as they are lighter than the later ones (and thus not as strong..but should support about 350-400 whp), get an aluminum flywheel (ive found that the fidanza are among the lightest ones), and get the FRPP aluminum driveshaft.</blockquote>