[57taskforce]

I don’t believe that’s the original engine. I’m quite certain these trucks never had egr or the vacuum switch in the thermostat housing. I would personally throw that stuff in the trash. I can’t help much for that vacuum routing unfortunately, as I don’t dabble in the later emissions stuff much. You don’t need any of that stuff other than the advance line to the distributor and the feed to the hvac, I’m sure you could easily plug the line coming off the choke or even swap it to an earlier style choke. Your truck, being a 3/4 ton I’m confident didn’t have the charcoal evap canister from the factory. If it did there would be a line coming off the gas tank Going up into the top of the passenger cab corner. The emissions on these trucks from the factory were pretty sparse. As far as I’m aware, the most they could have had was A.I.R and the evap canister setup, but that would have been on a 1/2 ton because the heavier gvw trucks had more lenient emissions standards. As for the fresh air side of the pcv, if the hose is bad you can probably get that from the dorman help line at your local parts store.