Originally Posted By krautrock
this might be the same short block on the same dyno using a similar camshaft but factory rocker arms and edelbrock RPM heads...

http://www.hotrod.com/how-to/engine/1412-how-you-can-build-a-stout-537hp-street-440/


Very similiar shortblocks but Steve says the TF engine has TRW pistons while the older article says Probe pistons. Otherwise they seem to be the same shortblock.