Thanks ,bought an old truck with a pontiac motor & it has a breaker
point dist in it. Looks like an older restoration with a Nova (or
probably ventura) subframe welded in at the front. Traced the engine
code to narrow it down to a '73 400 or a '74 455 all other engines
using a Y4 code are 76 & 77, so providing the dist is OE, I've narrowed
it to 2 choices. Will check the rest of the #'s to figure it out,
Thanks again for the input.