360 does not seem to be making power and is slow in the 1/8. Need help and/or suggestions

I didn't read all the answers. But I read of your input. You need a much higher converter. It should brake stall no lower 3500 with a small block you need a 4500 converter to do that. Get and 8 inch converter. I run a 5500 on my 340 and Foot brake to 3000 . Here it is on a foot brake