Alex, Im running a L28 (f54) with flat tops and a stock, un-molested N-42. I have triple webers, mallory unilight dist, and the MSA 270/280 Duration Cam.
My cam is set in slot #1. Currently my timing is at 30 degs. total advance, however the car does like to diesel sometimes when I shut it off.
I just got the motor running two weeks ago, have run one tank of gas through it. This week, she goes to Z Car Garage in San Jose, Ca to be dyno tuned.
Coming off of idle there is a dead spot, and it loads up when at stop lights, however I'm confident when I get her back from Rob and his team, she will be perfect!!!!
If it were me, and you want some serious power, lets hook up this week. The guys at Hubbard Machine in Hayward, Ca are working on my next build.
I have a few motors layin around and a bunch of heads... We will make something work.
Cheers.
-Dan