nice truck, I grew up on these. my grandpa's trucking co had the 1300, 1310 and 500 lightline internationals . I had a few IH pickups when I was young. I found a 1510 IH 1973 345 2bbl holly low gear 4 speed. previous owner swapped rear axle , original had a 512 gear and now it's a Chevy 456 with disc brakes. its sweet spot is 45 mph. international lightline trucks have interesting back stories.