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67olds · 11-27-2007, 05:10 PM

Redog,

Dealing with similar issue now on Chevy small block in 67 cutlass (wish it was an Olds 330). If your timing is already set using manifold vacuum connection, expect your timing to change significantly after switching the vac line to timed port. The (hopefully) 16-18" of idle vacuum present on the manifold port won't be there on the timed port.

Obviously, its no big deal, but expect to re-adjust timing. Going to switch mine this coming weekend. Tranny should be happy on manifold vac port.

Good luck,
jeff
67 cutlass supreme convertible

11-27-2007, 05:10 PM	#12 (permalink)
67olds Junior Member Join Date: Nov 2007 Location: O'Fallon, IL Posts: 9	vac advance fun Redog, Dealing with similar issue now on Chevy small block in 67 cutlass (wish it was an Olds 330). If your timing is already set using manifold vacuum connection, expect your timing to change significantly after switching the vac line to timed port. The (hopefully) 16-18" of idle vacuum present on the manifold port won't be there on the timed port. Obviously, its no big deal, but expect to re-adjust timing. Going to switch mine this coming weekend. Tranny should be happy on manifold vac port. Good luck, jeff 67 cutlass supreme convertible