Posted by Ed Trethewey on September 18, 1999 at 10:12:47:
In Reply to: Re: Fitting a 251 in place of a 230. (more info) posted by Damon on September 18, 1999 at 09:39:08:
1. Frame S/N top, right front frame horn. 2. Engine code and S/N on distributor side of block, top front, on raised boss; re: the "105" prefix, could the "1" be an "I"? 3. Production date of block stamped below distributor. 4. Big block engine around 25-inches long, small block around 23. 5. Measure stroke through spark plug hole or disassemble engine, who knows what size these things are after 50 years of interchangeability? 4.75-in.=265, 4.5"=251. 4.25=237