I always vote for a V8. I'm sure there is plenty of info to study on how to do that. Members here have done it and can explain the procedure. But they are right about it being more work than a 235/261. Custom Classic Truck and Classic Truck magazines have covered this swap many times. Read their archives. You can use original drive train or modern.

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn