The bottom line is how much money are you willing to spend? Anytime you buy used, the product is uncertain and you get no warranty. By your post, I see you're going to need to buy a fuel pump $100, adjustable fuel pressure regulator $70, #30 injectors $240, paxton oil cooler $265, paxta trac fluid $25, ignition boost retard MSD $186 and $1000 for the blower if everything costs only $400 for the rebuild. The blower for $1000 total is a great deal if it's in good working condition. You're going to need to buy the stuff anyways if you get any high output blower, it's just some of the new blower packages come with everything. The vortech A-trim would be an excellent candidate for your car and costs about $1800 new. If it's just for street the 9# Powerdyne is a good kit and costs about $2000 new and it comes with a fuel pump and computer chip. It doesn't live up to constant drag racing though, where as the vortech and your friends paxton will. If your a weekend warrior and want a 10- 11 second mustang, ultimately that Vr-4 is a good choice. If you want a fast street car I'd get a milder blower. As for pistons, I'd get a good lightweight forged street piston from any of the big manufacturers Probe, Venolia , DSS etc. TRWs are inexpensive but those suckers are heavy. Well prepped stock rods should be good to 500 h.p.
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