Go to
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and check out their b-boards. Plan on spending a lot of time as there is a lot of info being passed back and forth on exactly what you are asking. You won't be able to post unless you are a member but there is info on that as well.
My opinion is your ideas are very good, and the 58 235 was the highest rated horsepower ( 145 ) in the passenger cars at least. I wouldn't be surprised if there were no changes when used in the trucks.
I have a 58 Chebby P/U 235 6 cyl and I would like to talk with people who play with them. I wish to keep it a 6cyl.
I have a 2 carb manifold, and split exhaust (no on) good or bad idea ? I would like to put in a T-10 4speed " "
Want to improve the brake system.
ETC, ETC.
God Bless, Jim
PS You are welcome to reply directly