Morning guys!

Sorry i haven't had a chance to post, been traveling a lot for work.

I finally had a chance to pull the pass. side head off and not so good news, looks pretty rough, pics are attached. Must be a blown head gasket?

So the numbers are as follows:

Number by freeze plugs: 455
Pass side by head: 0245443 YW
Pass side by pump: 25P489182
By Distributor: 74 F174
Back pass by head: 485428

I think Bartbird is right in the thinking that this is an early 75 engine. The guy i bought this engine from still has a set of 46 heads i could buy for $200 for the pair, might do that after the holiday's, will the push rods be the same size do you think? I also took apart the old distributor and primed the engine, got about 60psi of oil pressure.

Thanks for all the info guys!