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Message: <blockquote data-quote="FlewByU" data-source="post: 1389572" data-attributes="member: 21566"><p>I have allways done all my own wrenching I'm poor. Lol poorish.  Anyway the machine shop wanted 3000$ basically for there labor and the machine work... Not counting for good rods/pistons bolts and gaskets... I just want a short block and I can handle building the rest of it.  Ive never built a shortblock from scratch. And I don't have the tools to measure everything right.  The tune is a lil off its a generic procharger chip it came with and I wasnt easy on it either. 400-425 at the wheels is all I really want.... So I've found a bunch of mark8 and aviator engines in my $$$$ range... With the goal like we said just 400whp    I'm guessing a b head mark8  and my procharger at 10 psi should be 400 since from what I read my cobra has this engine anyway except it was built by svt guys moe g and Wayne I think lol.   Sense that will get me 400 I would think that the aviator eng with it's c heads would do a lil more 420? or have alot more torque or may be just a better torque curve? I'm not sure if it's worth the trouble to do the aviator engine to get the c heads?</p></blockquote><p></p>