It doesn’t have the throttle body unit on it anymore. It’s a carburetor now.
That engine was never dyno'ed but the truck made a couple, three quarter mile runs so using the et and weight calculator that says about 280 hp. Torque was its big advantage it pulled real hard out of the hole, you shift about 4700 as it runs out power gains on the top end just levels off doesn't fall away. It is a lot quicker on carburetor than factory EFI with that cam which tells you the head and cam flow better than the TBI with custom PROM. The head is more responsive to duration than lift changes not that improving on the factory not quite .4 inch doesn't help but expecting gains at .5 inch is useless. 1.6 rockers on the intake help kick the lift rate faster as well as more total but faster is the issue to aim on, so they are useful on a more moderate cam as that lets it breath more mixture sooner in the lift curve which is helpful on these ports, so is back cutting the intake as this improves low lift flow. Those heads are certainly not race items but really aren't too trashy for day to day use and they do respond to tricks that improve low lift flow. But they do quit on the top end and there isn't really anything that can improve that much.Do you know how much power that S10 was making?
What rim size do you have or are you planning to use second set of rear rims with a Drag Radial??Eric what would be a good size tire to get with those drag radials