KD4UPL wrote:
That is a really cool truck. I love that body style. I assume you have a TH400 transmission and thus no overdrive. I don't know that I would go all the way to a 4:10 gear. A 3.73 would make a noticeable difference. Is the truck 4wd? If so you need to change both the front and rear gearing. It will cost you about $1,000 for each axle.
The gearvendors unit would also work but you couldn't use it in 4wd; that may or may not be an issue for you.
Does that engine even have a 4 barrel carburateur? If not, I would change the carb. Otherwise, short of a complete rebuilt, I would leave the engine alone. But, a full rebuild on that engine would be really cool. You could get nearly double the HP out of it with not much trouble.
Yes it has a 4bbl, no it isn’t 4wd and no it doesn’t have overdrive.
And a gear vendors would be useless. He needs more rpms not more speed.