Reply to "Pantera ZF 1"

My early pushbutton DOES have the crank "extension." I learned the hard way the importance of that, when I grenaded a new -1 transaxle after my last engine rebuild (of another block, not having noticed the extension on the old block). Without that extender, the -1 input shaft nose has no support other than the clutch disc itself. And yes, that means the Chevy spline clutch disc. I bought mine (and new 3-finger PP) from Dennis at Pantera Performance and don't really recall any grinding down that had been done, but you could ask him I would think. If the -1 plugs on REALLY easily, you likely have a problem (assuming the engine is still in the car, especially). It's the getting of that engagement that will likely make it a bit tweakier, though YMMV. Of course, I've heard of a "-1 1/2" transaxle that may have some hybrid characteristics here. But if your Mangusta had the extender, I feel confident you'll need it again for support, to avoid eventual mishaps.