1985 IMSA GTO Pontiac Firebird

Ex-Forbes Robinson-Millen, Riggins, & Carter. Period Race Winner



Dingman Brothers Racing Pontiac Firebird raced in the 1985 and 1986 IMSA GTO Seasons. Valvoline sponsorship. Driven by Elliot Forbes-Robinson, Tommy Riggins, Steve Millen, Craig Carter and Billy Dingman.

Overall winner at 1985 IMSA GT Columbus 500. Multiple podium finishes throughout 1985 and 1986. Two appearances at both Daytona 24 Hours and Sebring 12 Hours.



General Specification • Chassis:  Huffaker Engineering, full tube frame • Engine: 6.0 Liter Small block Chevrolet by Comptech, Pontiac cylinder heads, 600+ HP • Transmission: Weismann “shuttle box” 5 speed, spare drop gears, currently geared for Laguna Seca • Differential: Ford 9” with Detroit “true-trac” limited slip, 4.11:1 gears, full floating axles, Watts link • Electrical: Fully custom harness from PRS with all motorsport style connectors, Twin MSD ignition • Misc: Power Steering, Differential cooler and pump, Penske 7500 series dampers, 2 wheel sets, spare front splitter.

Restored under the ownership of Arthur Miller before being purchased by current owner. Differential upgraded, axles replaced, shorter drop gears installed and brakes replaced by current owner. Wired for radios.

Completely sorted and ready for Daytona Classic 24 Hours, Sebring Classic 12 Hours, SVRA Group 10 or CSRG Group 8. Enter Monterey for the 50th IMSA anniversary celebration!

All vehicle descriptions are accurate to the best of our knowledge at the time of writing. Corrections, and supplemental information, are always welcome. Buyers are responsible for confirming vehicle histories, condition, and authenticity to their own satisfaction prior to purchase. Motorsports Market is not the owner of the vehicle and assumes no liability for errors and omissions.

(c) 1996-2021, Motorsports Market. All Rights Reserved.

Questions, Comments, Offers?

Please Contact Us if you have any questions or comments, 

or would like to make a non-binding offer.