I must not have been clear, the engine is MAF not MAP. As far as exhaust I'm running no cats, downpipes into a y-pipe into a muffler to exit in front of the passenger rear wheel. Emission stuff (smog pump/thermactor system) has been removed from the engine as well.
Emission stuff is good stuff to have!
Mine still has the complete factory system. If/when it needs replacement, the same stuff is going back in- or as close to it as I can get.
FE isn't my only motivation for the steering conversion. These trucks are notorious for loud/inefficient power steering pumps, and I'm tired of hearing that pump whine. Also there is a lot of play in the steering, no doubt due to a worn gearbox, so there's a good chance swapping in a new gearbox will eliminate that problem.
Mine still has the original steering pump- no whine. They whine if low on fluid; often topping up the fluid fixes the whine but if it doesn't, it was let go too long and the pump got damaged (they are astonishingly stout though!).
My experience is that play in the steering is due to tie rod ends first, then other suspension joints, then steering box. You are going to want the best alignment you can have to max out fe and tire life.
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