I recently aquired 3 cranks. 2 were said to be from a b18a/b engine..and the other a b18c1 gsr motor..Well...2 will need to be resurfaced and the other one is good..what i'm trying to figure out is which are the ls cranks and which is the gsr crank..cause i'm hoping that the gsr crank is fine, cause thats the one i'm wanting to be using later...how can i identify them..i tried looking for the usual P72 for the GSR, or PR4 for the LS and can't find them, but i didn't look for too long..and if they are different, which i'm thinking they are cause the LS has a longer stroke than the GSR..Any help is appreciated...Thanks..