I recently acquired a 1972 model 413 industrial engine supposedly out of a dump truck.
A few things I found on this engine have me wondering...

Some on the internet say these 413 "cold weather" blocks are just under-bored 440s, so you can supposedly take them out to 4.32" or + .060" possibly from there. I know I need to get it sonic checked, but has anyone verified this?

All I've read online says these came w/ gear drives and reverse rotating cams...this one has a double roller chain in it. Wonder if it has been gone through before or if it came this way?

Are these big cylinder heads and related parts (water pump setup) worth anything or should I just send em to the scrapyard? The shortblock is staying with me...especially since it has a forged crank (which is a 6 bolt flange). I have the short tail w/ drum brake 727 too.

I thought the heat shields b/t the block and exhaust manifolds were interesting.