Timing

Cuda,

Thx for the input. A bit if a sage going on this car. But to answer your questions.

Solid lift cam and unknown but rumored to be an ISKY and likely over 500 lift 280 duration. So some bounce in vacuum expected. The leak down is still offering some issues as one can expect cold leak down to be lower due to rings being cold no lube. The worst cylinder came back after warn up but stll pretty poor at 45%. My guess is that I have bleed on intake valve or could be exhaust valve. Either one could affect vacuum and cause the bounce. I may need to back off on initial, or recurve the mechanical advance with a bit stronger springs to keep advance from coming in too soon. As far as vacuum leak. Have not found one and besides a stready leak would not cause vacuum to bounce.