Ok thanks that's good to know. The next question I have is about the flywheel and clutch setup. One of the engines that I can get reasonably is about a 78' I think. The owner used the flywheel for another project. Should I just be looking for a standard 168 tooth flywheel to put on? And should I go with a regular car/pickup style 11 or 12" clutch or could I get a button clutch for something like this. Reason I ask is because we have a button clutch in our GMC topkick and I was told all the big trucks use that type of clutch...