[north]

15 heads (sometimes referred to as 215) were the small valve high compression head used on most fullsize car 400's. They were used on both the 290 horse 2bbl engine and the 340 horse 4bbl engine. If the car had the no charge regular fuel option (therefore it doesn't show up on the PHS) it would have 14 heads which had much larger chambers.

The 066 type cam would be a good fit as the original 2bbl cam while very smooth is very demanding on octane due to very high cylinder pressure. Of course if you drive it gentle the original cam is best as it provides better bottom end power which works well with the 2bbl carb.

I'd try to find a good used 8 bolt timing cover and if not readily available go for a 69+ 11 bolt. As for using a 11 bolt timing chain cover you can keep your pulleys if you use the early 69 water pump (9796351) but if you use the later pump you will need the matching deeper water pump pulley. All other pulleys are not affected. I've heard mixed reviews about the repro 69-70 timing cover, apparently some issues about the centering of the oil seal. The 68 and 69 front alternator strap are different but they can be used interchangeably in a pinch but they won't line up with the rear strap aesthetically.