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Go to Mancini Racing, fuel systems, carb return springs you will see a picture - Carb Adapter and Spring, Stainless bracket mounts to rear of Holley, Edelbrock, AFB, Quadrajet and inline Duel-Quad carbs. Stainless springs are used to mount MRE's throttle cable and kickdown assemblies. Design...

A 30 H.P. over stock heads and if you put in 2.02 valves (Int.) better than 340 heads. Their castings just flow better and are new castings. Hughes rocker arms set up is great, low expense and will work if you decide to increase h.p. gains (bigger cam, torque convertor, pistons, carb, etc...)

I agree with Rumblefish360, there is a possible 30 + H.P. increase with magnum heads. Draw back are the head bolts (I would use studs, have to if alum. heads), the R/A gear is close to the same as Chevy and the intake manifolds available are - single plane Mopar Performance or dual plane Mopar...