Bob went to the Mopar for one reason........At the time, the SBM had a favorable weight per cubic inch and also Ford had made him mad. After the year he dominated with the Arrow, Ford stepped up with more help. Mopar offered to match it, but Bob had a shop full of Ford stuff.

Pro Stock at the time was weight per cube and those weights varied with the type engine it was. The Cleveland Ford had been hit hard and the SBM got to run MUCH lighter, because it did NOT make near as much power. Factors were not changed on a weekly basis and when they were changed, it wasn't JUST Glidden, it was anyone who ran that combination.

When NHRA went to the 500" combination, Glidden dominated for one reason. The BBF had a 4.900 bore space from the factory and a HEMI head available