HELP ME PLEASE!!! SHADE TREE MECHANIC THATS PUZZLED

[jwrattlesnake]

k ....i understand z22 motors dont have alot of brake your neck power.....but this is whats going on....i bought the truck 2 weeks ago ....it didnt have alot of power....no biggy there.....but yesterday it started skipping a little and an even bigger power loss....i checked the carb. which is brand new....the plugs brand new...the wires look ifffy.....the cap had some build up not much....this truck was a one owner old man ....never even been put in mud or hill climbing...it was used on the farm....its in very good shape other than now just boggs like the cat converter might be clogged....i feel alot of exhaust flow when i put my hand on pipe...but its all original so it is bound to need a change....we dont have to have inspections here so no smog control.....i need some help !!!!....i love my nissan...give me something to check please!!!! thanks brothers....GOD BLESS.............................................................................................................................Alright today i put a new dist. cap on and button.....new plug wires and .........carb cleaner and soap and water around the intake to check for leaks.....nuthin.....runs kinda smooth going down the road but still has a skip at idol......floor board it and only does 50mph.....dangit....dont sputter or cut out just boggs like its running on 3 cyl or something....no smoke...drilled hole in cat converter and nuthins in it i think....egr valve is not hooked up??? ....thought maybe yall nissan dudes could give me something i dont know about this thing.....got me puzzled...this is my first nissan....HAS 71,000 MILES ON IT....thanks yall