When I had the LT-1 engine built for my '73 Corvette in 1975 the engine builder used a torque plate, and a few years later the engine was checked by a local guy who ran Top Fuel dragsters and he told me my engine had better leak-down than his mega-buck Top Fuel engines. I definitely think it's worth it.
Mods: Ridetech coilovers, prothane bushings, braided brake lines, Pfadt ZL1 style sways, Hawk ceramic pads, Spohn trailing arms, Kooks 1 7/8 LT's, HF cats, Magnaflow 3" cat-back, MBRP rec tips, Cold Air Inductions black CAI, MGW short-throw shifter w/retro shift ball, Showstopper Engine Bling, Forgeline MD3P's 9.5 & 11", Conti DWS 275's & 315's. JDP harness and DRL's. Seibon carbon fiber GFX, Anvil carbon fiber rear spoiler. Oracle ghosted LED side marker lights.
Proud previous owner of: 1968 327 Camaro, 1972 Camaro SS 350, 1978 Z28, 1979 Z28. 2010 SS is My 5th Camaro