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Message: <blockquote data-quote="TxCobrA98" data-source="post: 638318" data-attributes="member: 8384">hey man, sorry for the lack of information on my part.96-01 have teksid blocks, forged cranks and hypereutectic pistons. gearing i would go 4.10s NA like everyone else says or somewhere around 3.55 for a boosted application. 4.10s will be high for a boosted car. also 450 is probably the limit on the rods/pistons in these motors. the block and crank will handle twice that all day long. I would just keep the B heads in the car and throw some boost at it. the b heads flow good. the motion plates in the 97 cobras are IMRC plates. (Intake Manifold Runner Control), which blocks off 1 set of the intake valves until 3250 RPMs, then all intake valves are opened. I deleted my IMRC in my engine build as I have a blower going on the car.this car will be a great DD man and a great platform to start on. you will also have freshly rebuilt heads (new valve guides/seals), ARP main studs and head studs, main bearings and rod bearings, etc...</blockquote>