Steve,
I don't have a Borla, but this is how I accomplished my Adjustable Pedal vs. Accel Cbl dilemma on my 363ci carbed LH drive RCR40 :
Wilwood Throttle Linkage Kit 340-12412 & Lokar Throttle Cable TC-1000HT96 (Your length might vary).
From the engine, I ran the Cable through the firewall and down along the LH side of the tunnel. From there it loops up, around, down and attaches to the Throttle Linkage kit via a fabricated Bracket. Several Bracket iterations and a lot of Cable adjustments later it works like a charm. The Bracket being attached to the pedals along with the cable loop allow the pedals to easily move back & forth.
HTH, Rod