Header Size Recommendation

I am leaning towards the 1 3/4 myself. I kinda figured I don't have a length choice.
That Hooker 5303 doesn't come up anywhere. But if it's a 1 7/8, I think that's a bit much; I'd rather err to the small side.
I should've checked the stall more carefully. When I took the truck apart (2008), I was going to use a 4spd in the Duster. It's been sitting untouched in the garage until now and I've decided to use what I have to keep the cost down a bit.
No power steering.
I have no problem with Summit headers. I've used them before. I think the 1 5/8 tube size is a bit small, though.
I do need a pan. That's on another thread.
I'm not ready to put the motor in yet, so I'll keep my eyes open to see what's available. I don't mind used, if they're in good shape and are for the right application. ("Oh yeah, they're for A-bodies".)
Thanks fellers!