Thanks Duff that is basically what I was thinking. And yes I had to change the starter with headers on a dirt surface. not fun.
I think I am done trying to make these headers fit. I don't think they were meant for a first gen F body anyways. I bought them knowing they might not fit. the seller guessed they were second gen

But today I think I made a good score. Comparing to Franks Pontiac parts and ebay prices I think I did well.

I got a set of stock 70 400 rod and pistons.( my 400 has a crank but did not come with rods and pistons) Hope to do a stock rebuild.

Set of log manifolds with an extra

Set of valve covers with drippers ( my 400 did not come with valve covers)

And a good oil pan ( my 400 came with a trashed and patched pan)
All for $100