I'm messing around with a 235 from the casting numbers the block shows to be a 55 w/powerglide, the head shows to be a 53. The vacuum advance is bad and I was going to replace it but decided to go HEI with it. Question being I removed AC R45TS plugs and was curious what everyone else used or recommended. Just FYI the plugs were all super clean and really didn't look like they had many hours on them.
