What is the correct angle for the engine/carb?

[Extended Power]

If you have read my post on how my new engine wouldn’t fit, you heard how it hit the firewall, as well as the heater housing.
I moved the engine mounts forward by one inch, and have removed the heater housing. (Installing Vintage Air)
Even after moving the engine forward by one inch, the right valve cover is STILL very close to hitting the delete plate.

My truck had the factory big block, with t-400.

I have moved engine mounts forward 1”.

I also have a custom transmission crossmember that has the correct 3* angle to mount the transmission.

My truck has 3” lowered A-Arms in front, and 4” drop in the rear.

Should/could I raise the transmission rear mount a bit more to gain more clearance behind the right valve cover?

I would think that with the truck sitting on level ground, the carb flange on the intake manifold should be level...

Opinions, answers, or other?