383, drinking fuel badly and lots of knock

[Fast355]

I think the cam is too small for that kind of compression and fuel with 93 octane is not enough.
You may try open loop with different afr. Runing richer not always mean poor fuel economy, because your making more power and use fuel more efficently.
Some engines don`t like 14.7 afr. Your cold start is really lean, you should fix that.
Get a wideband. If you want to dial the engine you definitely need one.

It will be great if you post your current bin.


Download and use much better program for logging like EEhack.
It also will give you some live tuning options.

With an aluminum head reverse cooled LT1 that compression and cam will work just fine on 93. The iron head cars had 10.5:1 compression and a 191/196 @ .050 cam on a 111* LSA in stock form.