I believe my 88 to be underperforming in the speed department.

It has a 2.25 petrol Turner remanufactured engine that's got about 20k on it. Zenith carb and overdrive, too. On a flat highway the best I can do is just about 60mph. Hit a hill and I'm down to 50ish. Downhill with a tailwind I'm good for 65 or so. It's concerning enough that it makes me very Leary of getting on the highway with cars doing 70+ coming up behind me.

I'm wondering if the carb could be holding me back. Either there's a problem with it or it's dirty or something. The truck seems to run fine. Decent idle speed but with just a bit of up and down, but doesn't stall or cut off.

I've also noticed that my fuel pump leaks a bit, but I have a hard time believing that's the issue. The engine just seems to run out of air/gas at higher speeds.

Would love peoples thoughts on where to start to remedy this. I don't intend to do an engine swap. Would consider a new carb (Webber?) for sure. Maybe even a new head /cam if it really made sense.

thanks for the help.