Curious on the performance, so I cannabalized a FF050 motor from a Revell Monogram Porsche 904 and geared it 3:1 with a Dart Hobbies 8t pinion and SCX Pro 24t crown.

Other parts used include,
Rear wheels\tires - BRM 14 x 8 Nascar/PG 22165
Front wheels/tires - MB Slot 13 x 5/MB Slot hard tires
Guide - Sloting Plus Universal 7mm
Whoa! What a nice running car. Not as fast as my Lola T160 builds but does Slot It sub 6 second laps. Driveability's so good at 81g that I'll skip my usual brass side pans. Will do a half interior driver tray/figure to keep additional weight down.
Pleasant surprise.
Dan