they were run on my lt1 392 engine for around 1000 miles that is it. around 750 invested and sell for 100+shipping so about 115 shipped. i ran them at 230 seat and 680 open they are a 1.65 diameter and huge. soild roller stuff. i checked them all and were all good. heck i didnt run them to what they normally run them at 250+ open pressures. I dont have the part number handy. my cam was 254 268 at .050 and 630 670 lift solid roller. u wont find a deal like this. not even for used stuff with tons of miles on them. lt1z350@bellsouth.net to get me quicky. i have paypal.