I have been inside the Jasper plant several times (I used to sell them powder coating). It is a well run organization and everything I saw looked top notch. I "think" they may sell a few hopped-up motors now, but don't quote me on that. Jasper is known for good quality stock-rebuilt engines. My step-father (40 yr. mechanic) used to speak highly of them. That's all I know... I'd run it like it is, though like Neil mentioned, I don't think they degree camshafts, but I don't think that's an issue unless you're trying to get every ounce of power you can out of it.