Oh I forgot there is a little bit of the head that might have to be ground down
And maybe the truck mount pads on the block.
I am running LA small block headers on a Magnum without any issue's.
What car,trans?
Thanks
73 Dart Swinger with 42RH OD and 2.73 rear gears.
your rpm at 60 mph would be no more than a fast idle it would get great mpg .