[Woodz428]

If it has a regular smallblock bellhousing pattern, it would have to be an early (read rare) 400. They only made them in the early seventies (I believe one year..1973). All other 400s and 351Ms use the 460 bellhousing pattern. The heads are no different than 351 Cleveland 2 bbl heads. If it hasn't suffered from cracking in the lifter valley it could be worth a good penny to someone that needs one. The small block bellhousing is a dead give away that it is not a 351M or a regular 400. Get the casting #'s, it may just be a 2bbl Cleveland, most of the early 400 with the small pattern were junked because of the cracking.