My Dad had one in a new '67 LeMans with the Sprint option and a 'glide. I wanted him to get a GTO, but you know, "gas mileage". As was said, it would stay in first all the way to 80 mph. 10.5 compression and no matter what you did to the timing, it would detonate unless it was fed Sunoco 260. It was the first motor to use a fiberglass reinforced Gilmer belt to drive the cam. Nice performance for an I6 and had a great sound. It sure looks pretty with triple Webers. Here's a link to the Car and Driver install in the XKE: https://www.curbsideclassic.com/blo...-moments-pontiac-ohc-six-powered-jaguar-xk-e/ Just one more of John DeLorean's ideas to take Pontiac into a more European direction.