The adjusters Mike's sells are designed to fit his rocker arms. They won't fit the stock arms without modifing the arms, cut away some of the arm for clearance.
From most of the reports I've read on the Mike's adjusters the plastic part break and the stell part falls out and can damage the engine.
If you want good elephant foot adjusters get adjusters from a Porsche. They are all steel. You do have to mod the rocker arms, but that is ok. Been working fine for many years. I've done the ones on my 75. Work great.
On the stock adjuster the ball end of the adjuster wears flat spots in it as well as pits the valve stem. A feeler gauge can't flex enough to fit into the pits or around the flatspots, this makes the clearances too wide.
The Porsche adjusters have a large flat area that contacts the valve stem. This makes adjustment easier because the feeler gauge fits between the two flat surfaces better.
The large flat sufrace of the Porsche adjuster puts less wear on the valve stem, so no pitting. Maintains the adjustment longer.
Also where the foot mounts to the stem of the adjuster collects oil. This oil acts kinda as a hydralic lifter. It absorbs some of the shock of the adjuster hitting the valve stem. This quiets the valve noise.
I've been running the 75 with them for 3 or is it 4 years now. Anyway it was one of the best mods I have done. I used to have to adjust the valves every few thousand miles. Since I did this mod I check the valve adjustments as often but have not had to adjust them.
Search the forum for how to do the mods, I'm sure it's on here somewhere, if not, I know it's over at The Garage forum.
To find the Porsche elephant foot adjusters, put them in the search on Ebay or just google it.
I got mine from PAPS Part. $3.15 each with about $12 shipping for the four. Probably cost more now, I did this a few years ago.
Leo
