Also, it might be a "can of worms" situation, but if you are messing around near the water pump, it might be a good idea to check out the timing chain. Mine was original, and original is BAD. They had nylon cam gear teeth which get brittle over time. I found out the hard way. But it sounds like yours was rebuilt at one point, so you're probably OK in that respect. You could always pull the fuel pump and get a scope in there to check.
Been trying to understand why my seat dosent seem to fold forward and found this handy little fella. Not sure if it's OEM. 100% sure it's neat. Found my rearview mirror!
In reply to Johntcarney :
That's the "Buddy Seat". It was a factory option, usually found on the higher optioned short bed trucks. They are rare these days and I am 100% jealous! I don't believe the center seat folds forward like the other two. Very cool that your truck has that!
In reply to Tony Sestito : I've looked high and low for any kind of lever mechanism that might tilt the seats forward and I'm finding nada. Handy little lever does front to back.... no kind of tilt forward to be found. All just keeping busy while I wait on a new water pump and rad. Too much fun!