I have my 261 up and running... I timed it at TDC according to the book. Idling about 600- 650. Idles great... when i step on the pedal... sounds great... the problem is when i back off the pedal... Does anyone have any ideas?

I was thinking maybe a vacuum leak but that would be on acceleration i thought...

Any help?

Thanks
Matt


http://www.flickr.com/photos/50657267@N08/sets/

1939 1/2 ton Resto-mod
1937 1 1/2 ton Is in the driveway