ZZ4 crate motor,around 5,000 miles. I need to check the odometer on the truck to be exact. More pics are here... http://coloradok5.com/forums/showthread.php?t=193247 It is GM part#88958603, here's a link for the specs. It's the second one down. I tried to take pics of the block head numbers, if you need more just ask. http://www.gmpartsdirect.com/results...ges=1&pkgid=21 This motor was bought new from the dealership at end of 2002. It was the motor that was to be allowed for the supertruck class we intended to run. Before the season started, the track altered the rules to allow the bottom motor on the list in our class. We had one practice day on this motor(maybe 50 miles)before the 400hp motor went in. Nothing at full speed as we were shaking down a new truck. Long story short, the 305 in my 87 was sucking wind and I was able to buy this for $3500. It was in my truck for about 4000 miles. I changed the intake to an edelbrock performer, and changed to a street style oil pan (the race one doesn't have a dipstick). It still has the factory seals on the head and timing cover. It runs extremely well. It can be started. You can hear it run. The stand has oil pressure and water temp gauges. It has 50lbs oil pressure at startup. I'll check the oil pressure when it's warmed up this weekend(too late right now for that much noise, stupid neighbors). I'll also do a compression check this weekend and post up the numbers. Anyway, this is a very strong motor that is in super condition. Asking.... SOLD motor, carb to oil pan, water pump to flywheel, ready to go SOLD add the Be-cool radiator and Black magic fan I an open to partial/full trades, particularly AR rifles, Yellow TJ half doors, etc. Let me know what you have. I would be willing to deliver this up to a day drive away (one way).