A used 30 over engine, apart, at a thrift store.
Hmmm, what could be wrong with this?
Here is one for $300 that I would consider before that one:
1966 289 engine
Please note, it is NOT mine, and it has been on CL for 25 days.
At a local auto swap meet, I ran across a guy who had a PAIR of 289 engines, complete, one with a transmission. One was out of a van, one was out of a car. One was a 1967, I do not remember the other. He was asking, IIRC, $200 each. I passed on them, and later in the day, they were still for sale. I really just wanted the pulleys and stuff off the front. He told me I could have EVERYTHING for $100. It turned out he was going to be going right past my house, about 20 miles from the swap meet, and he would DROP THEM OFF for the $100. So, when he was done, he showed up at the house, backed the trailer into the garage, and off loaded the engines.
Both of them were AC and power steering equipped. I stripped off all the brackets, pumps, carbs, timing chain covers, bell housings, etc. I put the engine cores on CL for $50 each. No takers, so after a couple weeks, they went in the truck to the scrap metal yard.