If it happens in all gears it may be a T/C or trans problem, though unlikely.
It would be hard to diag by description alone. Does it feel like its on a trans-brake (pulling hard then slowing down) without the motor changing pitch?

 

OK..

I think i might have found the answer by accident.

I've always felt like the car had 2 differetn problems. With the crane or Stock ignition it felt like the car just couldn't fire under boost.

With the MSD box it felt like it could fire but just something else acted like a brake.

Well yesterday I was cleaning up under the hood and I decided to remove the MSD Dial (boost per PSI) because i'm retarding timing threw the PCM. That dial connects to the MSD box VIA a little weather proof connector. Its been on zero for months now. I also removed the vaccum line (which is shared by the boost gauge and FMU)

I took the car out and ran it twice last night and once today and got no surge what so ever. And the surge wasn't a come and go thing before.. its never not surged or misfired. So it seems like its not a fluke but it might be, it might have fixed it.

I'm thinking that the MSD dial has shorted and that its seeing maybe infinite resistance and retarding the full 3 or 3.5 degrees per PSI. That would bring timing down to almost after top dead center. That would certainly feel like a engine brake.

I'll have no way of checking htis until i get a multimeter. (I'm away from home right now)

OR- the on board map sensor is bad or is leaky and bleeding boost from the vaccum lines on that side and screwing with the FMU.

I think the first case is more reasonable.

Anyhow..

I hate to get excited just yet but serously the past 3 pulls on two different nights have been really smooth and the datalogs are showing wheel spin up into 45 mph which isnt' too bad when your starting in second at 30mph.

 

This is where we need a fingers crossed smiley. Hopefully you got it nailed.

If you get it fixed and running good, when you gonna start marketing the roots style blower adapter kit??

 

Keep us all posted on the progress, would really like to see what that thing has with the bugs worked out.

 

don't leave me hangin.........i've been following this post a long time due to a similar problem.was that the problem?

 

So when do I get my money?