double doot: yes, I'm running it on a 261, upgraded from a 1960 or '61 stock 235 about 5 or 6 years ago, I would have to go back to the paperwork to see exactly; I can if you're really that curious. I got it dyno tested on 7/11/2020. The best pull was 128.91 hp at 3479.66 rpm and 225.93 ft-lbs at 2678.11 rpm to the rear wheels. I've found mixed information on what a stock 235 pulls to the rear wheels, but I'd be interested to know if somebody has that handy...
