In case you're thinking about a 4L80E...

[Robznob11]

I like the gear vendors idea, but even better than that just sell your engine and get a lighter, more efficient bad a$$ ls motors and use stock computer! You will be way ahead of the game. These ls engine's can and do hang with big blocks every day😜

[1972RedNeck]

Originally Posted by Robznob11

I like the gear vendors idea, but even better than that just sell your engine and get a lighter, more efficient bad a$$ ls motors and use stock computer! You will be way ahead of the game. These ls engine's can and do hang with big blocks every day��

Have you seen the OP's truck? It is restored to almost perfect originality. There is no way that I would ever want to see anything but the original 402 under the hood. I don't think the OP would either...

[davepl]

Originally Posted by Robznob11

I like the gear vendors idea, but even better than that just sell your engine and get a lighter, more efficient bad a$$ ls motors and use stock computer! You will be way ahead of the game. These ls engine's can and do hang with big blocks every day��

That's what I'm doing this very moment in the other stall with my '69 Camaro RS/SS 396 car. Out goes the ZZ502, in goes the LS3. Manual 5-speed though.