I have a '75 Lincoln 460 in my '68 F250 and had to change electronic modules recently. I installed a Pertronix because they no longer made the last one I had. I tried to time it and couldn't turn the distributor. For the last month I've been spraying Liquid Wrench and trying it every couple of days. It's moving a few degrees now but I'd like to remove the distributor and free it up. Does anyone have a suggestion other than keep at it? Thanks.