ausxb

Replacing the lifters means you must replace the cam as both the lifter surface and cam lobes have to mate to each other when you run the cam in or you will wear out your new lifters on the old cam. My guess is you have a stuffed lifter and when you check the cam you'll find it very worn as well. This was common to these engines even back when they were in warranty. Wish I had a dollar for everyone I did back then. Hope this Helps.

Hey Check out a website called Classic Inlines in the US lots of usefull Info there. They have been doing an Alloy Head for the Pre-crossflow for a while. They were originally cast and machined here in Aus but are now made in the states. Also Modify Log heads to gain Performance Cheers