With those numbers, they should be a late 1969 and a mid year 1970, both should be outfitted the same way, and I think setup for recreational use with spring return throttle and 3/4" standard shaft (looks that way int he parts listings anyway)----but I would verify that. They will both be later/common HS40 blocks with HS heads, but will have early mechanical compression release cams in them (they technically make more power).