Today I was trying to get my old drive shaft in. It appears it is slightly too long, now that I have my 460 /c-6 in properly and have switch to a 9 inch ford rear axle. How do you shorten these? Can I take it to a welder, and have him cut off say 4 inches and reweld the shaft together, or do I need to order a custom made one? Not sure what is appropriate. Thanks, Steve.