Help with my first engine build (5.9 Magnum)

Yup. Right until you stand on the gas. Then it’s anything but tight.
Man, that's Brutal! I've got a B@M Holeshot, had it for many years.. when I built the 340, and spent 300 and the trans shop to go through the 727 that was sitting for years ( and he missed the shift shaft seal) he wanted to see a new converter for a warranty. I took the Holeshit down, had it cut open.... guy worked there said " I feel bad charging you, I changed a Thrust Washer that had minimal wear" ... wish I could have had em put some extra stitches in it