As the title suggests I have a few questions about installing a 4 speed auto behind a 1958 261. This will be going in a 1941 Chev pickup. I did a search but did not find a relevant post. Maybe I put the wrong perimeters into the search engine.
Firstly to answer the why question that may come up. I am building this as a long term keeper and my knees aren't getting any younger. The rest of me is not far behind either
. I also want the option that both my grown up daughters can drive this, and they only drive autos. Where I live there is becoming more stop start traffic and I cannot see this getting any better in the next 10 plus years. Lets just say I am trying to future proof this build.
Therefore are all 261 blocks the same bolt spacing or will the later ones allow a 4 speed to bolt up with no adapter plate.
I am leaning towards a TH700 as they are more common in Australia. If there is a strong reason for a difference transmission I can go looking. My Diff ratio will 3.72 and my tire diameter will be about 30 inches if that alters the recomendations. I will also be using a manual speedo.
From what I have read I will need to go to center mount engine mounts.
I am keen to hear any advice, pitfalls and tips that you can pass on. Especially those ones that you wish you knew as it would have halved the cost of the project.
Also if there is an option of drilling the block I would like to hear it. Freight costs for things like adapter plates from the states are going through the roof.