I would say that unless you bought it new, its had a rebuild in its lifetime. Sounds like a good solid engine, how is your blowby? You can check by taking the oil fill cap off with the engine idling at operating temp, should have a slit stream of what looks like smoke. Raise the rpm's some to like 900rpm's, and if its all gone then you are good.
My install was 1500 with exhaust, gauges, and a used but rebuilt (rebuilt before sold to me by the guy who actually rebuilt it). He helped me install it with a couple other guys, charged me nothing except lunch
Lets just say that it has way more balls now than it did before. 0-60 times were cut by a good 3-4 seconds, down to around 12 seconds. Going up one hill I gained 10mph (65mph N/A compared to 75mph turbo'ed)......and the sound alone of that turbo whistle is worth it IMHO. I towed a 4000 pound boat over some mountain passes able to maintain 60mph easy. On wet days (and I live in the NW so I know about them
), I can make a sharp turn in 2nd gear and light up the rears and have my back end slide out. I can do that in 1st gear when dry out, and can break them loose in 2nd when dry like that (but no back end sliding). Trust me it is a totally new beast
. I actually have to be careful when driving while its wet, cause once the turbo's spools in 2nd things can get a little interesting.
1985 Ford F-250 with a 6.9 IDI/T-19 4speed 4x4
Paint, Eagle Alloys, Kelly Safari TSR's, ATS turbo, gauges
2004 Jetta TDI 5 speed
2004 2wd Excursion Limited 6.0. Testing how loyal I am to Ford
1997 Passat B4V TDI. 1 of 80 imported in 97. 50 MPG and a factory 25 gallon fuel tank!