A little history.... http://forums.hybridz.org/showthread.php?t=118747
Last summer, I installed a set of coilovers/HTS dampers from Beta Motorsports, and a fresh 3.36 NISMO Comp. LSD center section, along with a rear disc brake conversion (280zx). A stock L28E and 5 speed was dropped in as well.
Last week, BRAAP offered me a scorching deal on a BMW S52 drivetrain... http://forums.hybridz.org/showthread.php?t=150131
Why?... I've built/driven/campaigned a number of V8Z's. They're loads of fun. Fast, affordable, and effortless to maintain. However, the silkiness and refinement of the Z was lost in every case. I love the smoothness and aural qualities of the L6, but the L6 is so technologically challenged that it requires an incredible amount of money, time, and talent to build generous, street-able power. Some modern alternatives include the JZ and RB. Each has merit. So does the S52
Stock trim is 240HP, with a fat torque curve. 250-260HP is 'easy'. 300HP is not unreasonable with some effort. A street-friendly 9-10lbs/HP is looking feasible... N/A. And boosted results have been very respectable.