Had a new 98 with a 350. It did ok. I was farming and racing cars back then. hauled more than 10k all the time, and pulling 3 snowmobiles on a car trailer with the cruise at 80mph it got 9. Got 13 empty and I would probably prefer it to the 6.5 I am hauling with now.
3500 trucks had a HP rating at 250 instead of the 255 that 1500/2500 had. all dual wheel trucks had 4.10 gears singles could have 3.73 or 4.10. been a long time since I was a 4.56 in a gm truck. Also the HD truck that shows in the charts is equivalent to a 450/550 ford, not like the 2000 up when HD became the standard truck moniker.
As far as 99 being the last year for the 350,thats not quite right. the gmt400 platform was offered from early 1987through sometime in late in 2000. also the G-vans had them till the body change for I think 03.
