There are posts earlier in this thread going for a similar setup with a perch at 4 and things looked good. Bilstein developed the front struts to operate with a stock UCA in mind. Perch 4 probably keeps you well within the margin they intended.You guys are the experts, and that makes sense.
So I will install the 4 Billy shocks and 4 Billy springs. Question is what Perch to put the front in, to have the least amount of rake, yet being functional.
Perch 5 at 2.6 vs Perch 4 at 2.2?