Both my grandfather and I have reman engines in our Raiders. He got his from Jasper who has a good warranty and you can take it to the same shop whom you had install it for the warranty work. I had mine rebuilt by a local shop just to try somethin different. That way I can drive down to the shop if theres a problem and they'll pay for tow if something happens as will Jasper. So far neither of us has had any major problems. His had an oil leak at the cam seal which was covered by Jasper and some noisy lifters which was also covered.

'87 Raider w/rebuilt 2.6
Weber 32/36