Been seeing this post but never responded till now. Not sure if it helps now but.. I bought my 64 Plymouth in 92, it came with a 74 stock 440, torker intake, holly dp and I put a 509 cam and springs. Never been apart. Come with good vert and 4.88 gears, 14-32 tires ladder bars. I only ran 1/8 mile and ran 7.78 et at 94 mph. Don't know what hp that equates to but pretty good for a 8 to 1 comp. engine. Maybe one of the other guys can say how much. Unless the engine you buy has a lot of ring ridge, put in new rings, maybe a valve job and add ons then go with it