If you have room for a 1" spacer a 4500 Warrior would also work for you. I have a 4150 Warrior I converted to a 4500 intake. And made a adapter/spacer out of two 6"x6"x 1/2" aluminum plates.
Bottom plate bolts to 4500 stud locations with recessed Allen bolts. And the top piece bolts to bottom piece with 1/4" recessed Allen bolts. And your 4150 threaded stud hole are in the top piece.
A Warrior needs a spacer anyway. Mine runs best with a 1" 4 hole Super Sucker on top of the adapter. It works really well.
Good luck with your search. And do not let anyone tell you a Warrior is not a great intake for iron heads, it is.
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