CNC-Dude , I will send dirt, please send lifters!!!
The big boys use larger than 1" now, for us the hot ticket is the .987 Jesel keyway lifters but way too spendy for this hillbilly.
On the VW lifter thing, my main worry would be the side load on the lifter itself. It might work just fine with the right bushing. The only way to know, is do it!
