Slick 60's

I am looking for a 300 to rebuild and I would like a 4 or 5 speed tranny as well. I am looking to rebuild both and install them into my 66 F250 4x4. If anyone in the AZ area has one, please let me know; I am only in town for about another week then it is back to Guam for about two years. Thank you all for at least reading this.
David

Go with the 5spd if you can. It will sure help with mileage. The OD will up your mileage 30 to 40 percent, depending on how you go about it.
Fred