Maybe for a while-those pistons/heads closed chamber---------11to 1 compression, cast iron--------if he uses those heads hes too much compression for pump gas ( plus 93 octane is maybe dollar gallon higher than 87?) That exhaust valve shows very lean condition on at least one cylinder------

He can do seats and rebuild on the heads but will have too much comp for street tune so he ll need to change pistons---------or he can but new alum heads with somewhat larger cc and hard seats, etc and use pistons he has------then later put a 454 / 502/ 572/etc short block using the alum heads he will have already at that point-------

If he has this in a vehicle that needs numbers matching components--------whole nother story