Could Newman and Altman Have Chosen Another Engine in '65-'66? in 1966-83 Avanti Posted November 9 · Edited November 9 by Avanti83 · Report reply Put yourself in N&A's position, they wanted to sell cars. They needed an engine that fit, was proven to work in the chassis and fit with minimum modifications and cost. What would you chose? It had to be the SBC, why - cause it fit. Not only was it already engineered into the frame and attached to the existing drivetrain but also came from it's fiberglass brethren that by now was establishing a performance image of it's own. So the afterglow of the performance of the vette could also shine on the Avanti. All the other options needed to be fitted into the car and either didn't have enough cylinders to stir the soul of buyers or were just bigger, heavier and under powered compared to the Chevy. They had no other choice either engineering or financially wise.