[xbanone]

I just finished the exact same swap last week. My truck started life as a 76 GMC 4x4, 250 I6 and 3 speed trans. A few years ago we swapped in a 305 and kept the 3 speed.

In July I pulled the saginaw out and sent my $50 Sm465 to the local trans shop. I put in a new Luk clutch and it just bolted in right in place of the 3 speed. Of course, I had to cut a small hole in the floor for the shifter. I used the 3 speed clutch linkage and new polyurethane trans mounts on the original crossmember.

My truck is a 4x4 so I had to get the correct trasnfercase adapter to use with my Np205.

It is a very straight forward swap and easy to do. I wish I had done it years agao when we did the 305. Next to come is an aluminum head 355 or 383.

Oh yeah, don't forget to get the SM465 bell housing, the sag. bell has a smaller inner diameter on the input shaft.