Hi - wondering if anyone can perhaps id what family this is from and if its possibly a 428? and or what flavor?
428's were FE motors, that is a 385 Series BBFord. 429 or 460, most likely '7!-72 base level 429 with the 2 barrel intake.
If the ID sticker is gone or unreadable on the driver's valvecover, the only way you will know for sure is measure the stroke or pull the oil pan and get the crank casting number.
Block and head casting numbers won't help you, same numbers were used for both 429 and 460 since they share a bore size, just stroke is different.
Good solid 557" stroker build candidate if you can get a good price.