Remember this is a 80's truck when the Federal speed limit was 55 <img src="/forums/images/graemlins/smile.gif" alt="" /> It's pretty much a brick on wheel, just the way I like them.

250k is a lot of miles. First I would do a compression check to see what condition the valves and rings are in. If you get everything running in top shape your only looking at 109hp with the 4banger. Check the "depression chamber" on the carb. It's the UFO looking vacuum device that open your secondaries. It needs to hold vacuum and not leak down.

The jet valve's are are a smog control device, and are about worthless. When they replace the head they get
a non-jet valve head. You will see a reference to a Clearwater head which is a company in Clearwater Florida where we get them.There is no performance gain either way.
There is no aftermarket head but you could have a stock head ported.

The Raider V6 option, almost everything is different, you would be better off buying a V6 Raider.

The most common power upgrade is the Turbo, you get the parts from a doner Conquest or Starion. Lot of info on that and at least two turbo Raiders in Colorado. A well built 2.6 Turbo is pushing around 200hp, depending on boost.

You can get a aftermarket Weber carb, it will eliminate all the vac lines and add a few HP. There is a debate on if it's a reliable off road as the Mikuni.

As far a V8....well you can go where ever your cutting torch takes you.

Welcome.

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