here's a list of engines i am considering for my 1972 240z. i know i want something that can reliably push 300+hp. i'll settle for a little less from the stroker just because of the sound of those carbs and the over-all nostalgia. i'm so torn, i'd hate to spend ~$8000 (practically max out the l-series engine) and feel unpowered in a year or two. with the SR i get great power, light-weight, almost unlimited part selection but that awkward gap (personal preference for the z) in the engine bay. the RB would give amazing power, but at a cost. remember, i want this to be reliable so i'm gonna do a rebuild regardless. i know there's a lot more involved with these swaps like fuel upgrade, tuning, custom driveshaft, clutch, etc but i just put together a simple list. i don't need a 10-second car, but i want something extremely fun to drive on the streets, that should do sub-13 seconds down the 1/4 mile with supporting mods. so which would you choose....and why?
SR20DET:
*Mckinney Mount Kit $0600
*Engine $2000
*Machine Work $0500
*Forged Pistons and Rods $0800
*Gasket Kit $0300
*Brian Crower Camshafts $0300
*Titanium Springs/Retainers $0200
*GT3071R Turbo (w/ manifold, d/p, etc) $2000
*720cc Injectors $0300
*Electromotive Tec3 Stand-Alone $2000
*Odds and Ends $0500
*Total $9500
Estimated Horsepower: 350-450
RB25DET:
*Mckinney Mount Kit $0600
*Engine $3000
*Machine Work $0600
*Forged Pistons and Rods $1200
*Gasket Kit + Greddy Timing Belt $0600
*GT3076R Turbo (w/ manifold, d/p, etc) $2000
*850cc Injectors $0500
*Electromotive Tec3 Stand-Alone $2000
*Odds and Ends $0500
*Total $11000
Estimated Horsepower: 425-525
RB20DET:
*Mckinney Mount Kit $0600
*Engine $1500
*Machine Work $0600
*Forged Pistons and Rods $1200
*Gasket Kit + Greddy Timing Belt $0600
*GT3071R Turbo (w/ manifold, d/p, etc) $2000
*720cc Injectors $0500
*Electromotive Tec3 Stand-Alone $2000
*Odds and Ends $0500
*Total $9500
Estimated Horsepower: 325-425
L31 STROKER:
*F54 Block $0300
*P90 Head $0400
*V07 Crankshaft $0500
*Machine Work $1000
*9mm 240Z Rods $0300
*Arias Forged Pistons $0700
*Aftermarket Camshaft $0300
*Kameari Twin Idler Gear $0700
*Gasket Kit $0500
*Triple 45 Carbs $1500
*Electromotive XDI $0800
*Odds and Ends $0500
*Total $7600
Estimated Horsepower: 250-335
L31 STROKER (Pre-Built Ebay):
*F54/P90/V07 Pre-Built $4000
*Aftermarket Camshaft $0300
*Kameari Twin Idler Gear $0700
*Triple 45 Carbs $1500
*Electromotive XDI $0800
*Odds and Ends $0500
*Total $7800
Estimated Horsepower: 220-335