Can someone help with TTI headers and a 360 ?

I'm 62 years old, been playing with a bodies, small blocks; b bodies, big blocks since 1970.

If you can find a good set of factory manifolds, jump on them. The headers are a pain, they get in the way of everything, only get 30 hp more.

Working on a car with headers involves a lot of; I think I can feel it. But can't get a tool in there.