Ok wait guys...although i truly beleive most of yous are very very good at engine rebuilding/tuning and yes i read what yous write back and beleive totally on what yous say.. apperantly this engine only has 100k on it. I had purchsed a 429 off a guy that said it was burning alot of oil. This motor had 200k on it at the time. I installed this engine in my F250 that i was using to haul my race car around with. Fortunetly for me i had a standard trans in my truck, after the installation i went for a ride down the road, brought the truck up to 70 miles per hour, then just reached over and shut the key off with the truck still in gear. the rear end continued to turn the motor over without it running. after it coasted to a stop, i just restarted the engine. A big cloud of smoke came out of the exhaust emedietly after starting. At that time i knew the valves seals were finished. After changing valve seals that motor would run the full 3000 miles between oil changes without burning more than 1/2 quart of oil. In conclusion, Is the truck running low on power? or is it just burning oil? have you checked the compression? If money is an issue ( and with us it usually is,..lol) try the simple things first. Maybe you will be rebuilding, then again maybe not. Just a simple way of testing without needing special tools
Rick