12-1 wheel is 7.25", stock bolt pattern with plenty of holes option spacing and center circumference opening based on a real Pontiac balancer.
Brackets will bolt onto the timing cover and clear under the large stock crank pulley.
It wasn't created to make money, that's why the other company's said they didn't offer it for us, we wouldn't buy it. So since I wanted to run it, they challenged me to show them that others can do what they do and offer it at a similar price as the Ford and Chevy kits even at 25x less production numbers.
Not sure yet what is different about the March pulleys but it will fit any Pontiac balancer unless something was changed on it. Like any new kit, customized factors can change the fit.
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69 GTO Convertible, 4000lbs
462ci, 606tq/569hp - 93 oct at 34 deg (207psi)
11.7:1, KRE H Ports, Lunati HR 282/290 w Johnson Lifters & 1.65 Scorp, E30, EFI, Holley HP + Dual Sync, 12-1 Crank Trig, 120lb Inj & 1000cfm TB, Torker II EFI Int & Rails, PTC 10" 0 Stat, Ricks SS Gas Tank, Magna 4303, Aerom EFI Reg, Aero Front & Wilwood Rear Disc Brakes, Dougs 1 7/8" Headers & Borla Pro XS 3" Muffs, Alum Rad & Dual Fans, 12:1 Box, UMI Control Arms & Viking Berz Fr + Rear CO Shocks, Hella UP28 Vac Pump
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