Baer 4&6 piston calipers

[GT-350 69]

I have their Track system with front 13" rotors and 2 piston calipers in my 69 with VWW 17" wheels. I'm thinking of getting their new 4 piston calipers.Is anybody using their 6 piston on the front? What size wheels? It looks like I'll need a 1/4" spacer to clear my wheels. What do y'all think of spacers on a car that will be autocrossed and open tracked?
Thanks,
Tom

 

[Bullitt]

Spacers that small aren't an issue, just make sure you've got plenty of wheel stud and keep the wheels torqued right.

 

[GT-350 69]

I have ARP 3.5" studs with 2.5" lug nuts. Thanks.