I was at a POCI Badger chapter picnic last weekend with a guy who had a '67 GTO with the 400 HO. He was complaining about his long branch exhaust manifolds. His beefs were heat transfer to the starter, and the difficulty of removing and installing the starter. He said it was a two man job.
The guy's comments are contrary to everything I've read. I thought cooler underhood temps and factory fit were the advantages of long branch manifolds.
I've got log manifolds now. Some day I'll either go to coated Hedman's or RARE long branch. There are just too many other things that have to come first.