Have you pulled the oil pan yet? If that "TKB" suffix is on the machined pad at the front of the right cylinder bank, it's possible you've actually got a 4-bolt main engine. Most of the "T" suffix engines were 4 bolt.

When I bought a 54 model 235 engine and trans up in Indiana a couple of years ago, the guy GAVE me a 4-bolt 350 with one piston and rod assembly missing just to haul it off!
Jerry



"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!