Like using an old shaft with new cam? Using an old shaft that's already worn opens up the clearances between it and your new cam. Just better to have everything new. I don't think it's as much as compromising the intermediate shaft as much as just having everything in it's intended tolerance. Slope affects timing, can lead to more wear and failure... you wouldn't use old bearings with new rods would you? That's just what I'd imagine why
No not a used shaft just an orginal version. Like a original shaft is like 40 bucks the hardened bronze gear shaft is 145 I don't understand why you need that shaft with a new cam what changes that the original style wouldnt work
