2056 still working out the bugs Options

[jmargush]

I am sorting out my recently built 2056 specs below:
2.0 Heads were done by Len Hoffman
CR 8.56:1
Full Raby valve train kit
Stock L-jet throttle body, air cleaner, and intake runners
stock 2.0 heat exchangers
pertronix ignition


It has a miss under hard acceleration.
All the vacuum lines and oil cap gaskets are new and I can't seem to find a leak any where.
So I decided to recheck the timing.
Pulled vac lines off the vacuum diaphragm and plugged, set idle to 800 rpm
timing was a little more advanced than it should be but not dramatically, but I did reset to factory setting.

Drove it and it is even worse than before.

Would the new engine combo warrant a different timing?

Fuel filter is new but my next step is to check fuel pressures and injectors.

Anything else I should be looking for?

[jmargush]

Well the new diaphragm on the distributor didn't fix the miss under hard acceleration.

So I tried another distributor with points no success, so I advanced the timing a little just to see and no difference.

So do I still keep looking at ignition or is there a possibility is is just to lean that there isn't enough fuel under hard accel.?

I know this is what the AF gauge and O2 are for but that isn't going to happen in the next two days, and I really wan to run it at the autox this weekend.