I have an 89 5.0 in a '65. I converted it to a v belt system--alternator and the Classic Auto Air add on system. Trouble is I cannot get the crank pulley-an original '65 3 groove crank pulley, to line up with the water pump pulley(an original '65 two groove pulley). I am about .130" off--such a little amount makes quite a difference! All the spacers that are available are at least .250", and my machine shop(great bunch of guys) looked at one of these spacers and said they couldn't machine it down, because then the pulley register(circular indentation) would be gone. I went to NPD, and bought fancy aluminum (and expensive) pulleys for a '65, still same problem. I am using a Romac balancer with the early 65-69 hub width--3 inches. Finally, one machine shop guy said it could be due to the fact that my 5.0 motor's crank sprocket is slightly thinner than one for a 289, hence, my '65 water and crank pulleys won't line up--that's his guess. The water pump is a Stewart for 65-69 Ford small V-8. Machine shop used a Rollmaster timing set made for 85-93 5.0. Maybe we should have used a different one? So, as it is I can't run the brand new motor because we can't figure out how to get these pulleys to line up, and still utilize the all important crank pulley registering lip that is built into 65-68 289/302 crank pulleys to center pulley on balancer . I am stumped, never had this happen before on an engine rebuild, but without those pulleys lining up, no going forward. Any thoughts/possible solutions would be appreciated. Happy New Year.