Want Advice on a Rebuild

[Muellers69GMC]

I just registered for this board so you can check out my intro thread http://www.67-72chevytrucks.com/vboard/showthread.php?t=343409 to get an idea of the truck.

As mentioned the truck has the original motor and transmission. The motor has over 133k miles on it. It still runs, but is definately tired. I want to rebuild it. The question is how original should I keep it. Should I do a completely stock type rebuild or disguise some performance in the stock block? If the later, what would you do? Don't really have a definitive budget for the rebuild so consider anything on the table as long as it involves using the stock block and heads.

No matter what I do to the motor the TH400 behind it hasn't been rebuilt that I know of. It still shifts strong and doesn't seem to slip. Should I keep it as is or look into it and refresh it?

Thanks in advance.