something 3 keep in mind with the more cubes inches u need moore airfow in and out, so you need to think in big block nubers
i went with a 393 cause of the added cost of truley gaining the added benifits of the additon cubes went outside my budget
header that worked on a 393 i didt think woulud work on my 408, (the mac 1" 3/4 long tubes $325, or the next step was kooks at 600 bucks) the mac ones i belived would work on a strong 393 but would be 2 small on a strong 408. that was just an example , many things also, head flow, intakes and carb prices are increased because of the addition pieces even on top of purchasing items for the 393 vs 408 cost comparative
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1983 mustang, 393 cubic inch stroker small block, victor jr heads and intake, gold race 1.6 roller rockers. comp cam 304, 244@ .050. .576" hydralic retro roller cam,lunati rods. block was o-ringed,10:1 forged pistons, speed pro fit fit rings, clevite bearings,msd distributor and igniton,be cool huge radiator, black lite electric fan, march underdrive pulleys, mildon deep sump oil pan, mac 1 3.4" long tube headers, 3" dr gas x-pipe and mac exhaust,ARP bolts. car weighs 2900 lbs w/out driver, sub frames, weld wheels, mickey thompson sportsman pro 26 x 10.5 x 15's,#8 fuel line steel braided
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