HP gain of 10.5-1 pistons vs 8.8-1 in a 273.

That's what we like to hear.If I ever pull mine out I will dyno it just for fun. Then my first Desktop dyno run would be pretty close. I set it up with manifolds and it made 255 hp. Headers should add 10 hp or so. The Desktop Dyno is very close again.
Care to do a 68 318 on that desktop dyno? I hear 180HP thrown around quite often, I think it has more beans than that.