3 speed to 4 speed od switch few ?ss

[wlf89]

ok i have finally saved up a little money and am thinking about putting the 4 speed od MY6 trans from the 80s chevy trucks in my 69 in hopes for better gas mileage. from what i have heard its a direct bolt up from my old 3 speed. my questions are what else will i need to make this swap a sucess. i need to get the shifter and linkage with the trans right? what about driveshafts will i need a different one? i hope i can find one around for a decent price.