1976 Trans Am

We bought a 1976 Trans Am 4 speed 400 engine in Rhode Island. Started and ran, very loud. Owner had passed away, and family sold it. We were told the car was sent out, and the engine was rebuilt. Car has headers, and has the usual problem with the clutch rod hitting the header when you push it down. We got the car home to Mass, and when checking the oil, we discovered a more severe problem, but fixable. The dipstick bottom was broken off. So we put another dipstick in, and started the car, and shut it off, and broke THAT dipstick. Whoever rebuilt the engine FORGOT to put the dipstick extension tube in the oil pan! the dipstick end flopping in the oil pan gets destroyed by the crankshaft. So, all we can do is bring it to our transmission shop, and have them remove the oil pan, then remove the two dipstick pieces, install the extension dipstick tube, and see if the scraper is on the crank main bearings. We plan to do that this summer. I'm too old to attempt to fix it myself. We don't know if anything else is damaged in the oil pan, or if it has the oil scraper. Any thoughts would be appreciated. Thanks.