Last weekend, on my annual sand dune trip, the coach developed an exhaust leak at the engine. I had a chance to investigate a little further when I was getting ready to leave the GMCSJ Christmas Rally this morning, and discovered a substantial crack in my left exhaust manifold. I know the left ones are hard to come by, and I'm wondering if anyone has a good one available that you might be willing to part with for a reasonable price?

The other option, of course, is to install a set of headers, but that's just another large expense. I already have Jim K's 3" aluminized, two muffler, exhaust system, so the headers should be a simple bolt in installation. Being in my ninth year of GMC ownership, I realize the simple jobs are rarely as easy as we hopr they will be.

Any sage advice?

Thanks

Left side (driver) is easiest to find. 455 and 403 are same also Toronado. Cast J. Cast number 407103.

My coaches both have headers. They're both different, I suspect the 23' ones are Thorleys and the 26' are Someone Else's. I don't see a lot of heat relatively, but I've not run a manifold engine for comparison. Both coaches have a fair amount of woven heat fabric around wires and cables which seems to protect them.

--johnny