340 tune up

68-71 long blocks (Sans 68 4 speed cam deal or TA block/heads) are essentially the same. Same cam, compression. The spinning parts aren't different.

915 vs X heads roughly same.

The 71 got a TQ carb/manifold. That was the difference. Also got the bad pass side exh manifold. Should have left the sweep manifold vs log style.


I would not be tearing into an engine without doing some test to see if it's a viable runner. I've started stuff in an hour that sat for 30 years. Check dipstick, radiator, socket on crank bolt to see if it turns over by hand, change oil/prime it, etc. Do the simple stuff before ripping it apart for no reason.