I would say unless you have a problem such as a big miss or an oil burning problem, the best idea would be to leave it be for now. I have seen the kits too but if you go that far, you won't know what sizes are needed until it is all torn apart.

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed

My Chevy Master 4 Door is on the Road!