another 258 power question
Here's what I have
on the highway my jeep runs great in 4th gear street driving its a monster 5th gear not so much it cant keep enough power in 5th and I'm trying to figure out why
258 bored 30 over very small cam (cant remember what it is)
nuttered (kinda, mine is an 82 but still had some stuff that could be removed)
TFI upgrade with 8mm wires and new plugs, HEI upgrade (in the dura spark box),mc2150, nv4500(Chevy), Dana 300, 4.56 gears, 35 12.5s, 3" snorkel all of this made great differences but it still just doesn't like 5th gear.
One question is would the exhaust make a huge difference and allow me to hit 5th would a plugged cat cause it to bog down after running for a while at speed? |It will hold 4th no problem 3000rpm and still pulling but 5th gear hates me. Any ideas? I know the carb is built right and timing seems to be great idles like a dream. My father is a mechanic of 30 years and he is giving up and saying its just the way it is I would love for once in my life to prove him wrong.