CSP Bellcrank Linkage ?

[Cyrus2Dope]

Ok I finally contacted CSP or what I am assuming to be CSP in america (Classic and Speed Parts out of California) I talked to the guy there explaining that I was putting webers on an upright type 4 engine and I needed linkage. He was unaware of the type I needed to use, aparantly they have three types off bellcrank linkage there one for a type 1 engine with a porsche style shroud, type 4 engine with a porsche style shroud, and one for what he called a normal type 1 engine with normal shroud. Now this made me an a friend think. Is it possible to use the type1 style or is there a size diffrence length wise from where the carbs would sit. Does any one know what type of bell crank i am looking for? Or am I even talking to the correct place? Also does any one know if there is a diffrence between the lengths of the 2 engines from head intake to the other? Thanks allot