in the 1962 chevy II, a new 194 thrift 6 (I think) was released as an upgrade to the base 4 cyl. 63 brought about the 230, and the 250 followed (don't recall the year, would have to go to ref material). Biggest giveaway on early (216.5, 235) and late (194, 230, 250, and 292) is as simple as rounded old and squared new. Then there's lots of detail ways, but let's save that for the old GMC inline sixes, (OK, not 261, the 270 and 303 to name a couple) versus Chevy early 6.MCW resin says the eng-01 kit is for the early chevy II bodies being cast.