My 250/3 spped to 350/4 speed swap

[OJ1988]

Just want to chronicale some of my swap details to help others.

When I began to make my swap I looked around and got a lot of different answers from different places about what will work, what has to me changed ,etc....

Hopefully this thread will help others.

First a little background;

truck;

1969 C/10 short bed stepside. 250cu inline 6 cyl. 3 speed column shift.

Truck was all original and in daily driver condition. Only changes were,

Clifford 4 barrel intake manifold
450 cfm holley 4 barrel
Pacesetter longtube headers
HEI distributer.

I drove the truck daily like this for 6 months before I tearing it down for the swap.


New engine,

GM 260hp 350cu crate motor ordered from Jegs.
Added an Edelbrock Performer intake
Numbers matching to the truck Quadrajet carburator

For a transmission, I happened to have a M-20 Muncie wide ratio four speed laying around.



I wanted the swap to be as easy as possible, reuse as much as possible.

SO lets see what I did and learned.