I pulled the 248 and hydramatic out of my 1955 GMC 3100 and stuck a 350/350 in it. The truck ran great when I pulled it, I just needed a little more power and got a deal on my new combo so I couldn't resist. The only "issue" with the motor was that it had a crack in the block on the drivers side that was fixed when it was rebuilt around 1999 and did fine, but about 3-4 years ago it started to slightly leak coolant from the fixed crack. Other than that the motor and transmission both ran great and both have very little mileage on them...maybe 40,000 (estimate)
If you have any questions feel free to ask me! Make an offer, it needs to go! Thanks for looking!