1948 3100- Need direction on 5.3 year and 6l80e or 4l60e

[Speedbumpauto]

I did the 4L80 after trying a 400 with a manual OD. Since I'm spending your money I'll relate; Shortly after my purchase but before the install in the 55, I fulfilled a bucket list thing and got a C6 Vette with a 6 speed auto. When I was shopping, I didn't give much thought to the year split when the vette went from 4 to 6 in the auto. It was more of a budget thing. Had the vette for a couple of years now and the grin that 6 speed puts on my face is "priceless." And that's in a light car with lots of engine. Just some food for your thoughts and wallet.