I just went thru this , finding spring I like. Camaro big block spring 6314 TRW makes big block camaro sit nice. The 5370 from TRW is hevier spring. In my 73Nova 6314 gives me almost 3'' off top tire to fender lip and 5370 was little more. Wire diameter differant. 6314 - .610 and 5370 - .640