Dude...before i answer...umm why would you have all GSR internals with a b18c5 bottom , crank etcc? If you wanted the power of the Type-R you should have just gone with the Type-R head, and like a b20, or LS bottom end or sumfin...the valve train in the Type-R is 5x better than that of the GSR...but oh well...i would say yes...compression test that sucker...hmm buds prelude took off on you in 3rd gear you said huh? Got me man...make sure everythigns runnin fine though...