318 crank pulley correct size??

just an update...I decided to stick with the 75 timing cover. Since I needed a new wtr pump, I went with the alum. pass. side exit and found a pass. lwr side exit radiator (mine was from a 63 413BB apparently).
Also, a set of CVF pulleys...cause...it was fathers day....and I earned it. :thumbsup:
kuda and nm9, thankyou for all the input! Don't worry, there be other questions coming.