I am having a problem now with my 454 engine that I took from a '79 suburban and put into my '69 nova.

The engine runs fine except for when you hit fill throttle (at any speed) it chokes and starts bogging down. Someone told me it might be the fact that I am running dual 2.5 inch exhausts and that they are too small for it, does this sound right?

If not, I cant imagine what is wrong since i didnt change a thing other than re-set the timing and distributor when i put it in the nova. I do have it hooked up to vac advance and i tried both ported and manifold vacuum with the same result. I also played with the timing a lot and got the same result every time.

I never got to try full throttle before I put the exhaust on because of the noise issue in my neighborhood.

Anyone have any suggestions??

Thank you