I thought I had an exhaust leak so tonight after dinner I went out to see if any header bolts have come loose. I took my intake tube off to tighten the header on the passenger side and seen what I thought was a small crack on the 3rd from front tube....So I went to clean it up with the wire wheel on a die grinder and weld it but before I cleaned it I seen a crack on the front tube on the passenger side almost the whole lenght of strait part of the header tube. Should I try to fix the headers or replace them. I have a mint set of stock ones from a 86 GT I could use but I would rather just buy a nice aftermarket set since I will probly end up taking theese off anyway's. any brand you guys reccomend that I buy..... Let me know what you guys think.