Weekend Big block swap

Ok. Im swapping in a 383.
Hedmen 1 3/4 b-body headers. Theres a whole article i read on big block dart that they will fit with sone hammering. They were $215 to my door. Ill try to make them work
AH i missed the 440 part. my bad, interference points are going to be the same mostly, except being that of the wiper motor, should be fine there. Blower motor being the AC one might interfer as well. Easily fix though. Expect to hammer a LOT on the headers. 215 isn't a bad price at all. Where'd you source those from? New/Used?

Are you using the schumacher kit?