Clip: The bad news is...
What you have is basicly a "car" engine in a truck.
The good news is...
It is one of the most developed engines in history.
It should not be hard to find a knowledgable speed shop which could make a few mods which would make significant performance changes for the task at hand.
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Not to beat this topic to death (but I will)......
The 302 wasn't that well a developed engine when that one was built 20 years ago.
I had an almost new Ford p/u with a 302 in it when I bought my airstream back in the late 70's and, after three short trips pulling an Airstream, that weighed about the same as the mentioned
BigFoot, I traded in the Ford for a Chevy with a 350, and pulled the Airstream over 22,000 miles in one year without problems.
Adding performance stuff to a 20 y.o. engine, with 170,000km on it, may not be the best idea to retain reliability.
IMHO: The most developed engine in history remains the Chevy small block V8, from 265 to 350 c.i., (as well as the respected 262 c.i. V6 derivatives), now in it's 58th year.