bit hard to tell whats been done by the pictures. its whats on the inside that counts..
it takes a bit of work to get a 180+ reliable pinto.
surely the seller has the receipts of what has been done???
you should get the builders number off him and give him a call.
if not, it is on an engine stand, so easy enough to rip the sump off at least and have a look.
I'm always skeptical of buying engines from people that have no idea about them and have not been involved in the build.