8 Pontiac 370,389,400,421,428,455 7.080 long NASCAR steel connecting rods NOS very Rare! 2.375 big end. .927 pin end. Forged rods. Excellent condition! The Pontiac 366 NASCAR engine, developed around 1970–1971, was a specialized, short-stroke variant of the Ram Air V (RAV) engine family, designed specifically for high-RPM NASCAR "Baby Grand" and later Winston Cup competition. These engines utilized exceptionally long, custom-forged connecting rods—sometimes cited as 7.08 inches—to achieve a superior rod-to-stroke ratio, aiming for reduced piston side-loading at higher RPM! To maximize durability, engineers used specialized, long connecting rods (Carrillo forged) to reduce side thrust on the pistons, which allowed for better longevity at 7,000+ RPM.