Good suggesstions, I still have original rear end and which would be 4.54 or something like that, My truck reached about 55 miles top speed , however I am looking to swap rear end with lower gear 3.53 or something in that range. I dont know with original tranny how much that can make. Now a days even with 65 crusing speed is not much in the freeways, atleast a 80 would put me on par with other vechile speeds on the freeways. Well for me this is my first project and everything is a big learning curve and swapping to 350 requires so much work from front to back. I am going to restore my truck with body work and painting and I dont want my truck look sharp and drive like a duck.

With 235 motor with any better upgrades, what would be the top speed I can achieve.

Again thanks for all the suggesstions.

Ganesh