They make a Dogbone style Lifter with a Steel Guide, They are a Bolt-in in the Block. However, you will need longer pushrods (about 1 1/2" longer) and also have to check pushrod clearance in the head, thru the travel of the valve. The Pushrod Seat in the Lifter is just above the Roller, so it is deep into the Lifter. The reason behind it is to reduce the side load on the Lifter with the seat being deep in the Lifter body, versus being at the top of a stock lifter. Only bad thing about them is cost. They're about $210-230ish per Lifter plus the cost of the Guides at about $330ish for the kit. I lucked out and scored a perfect, low use, used set for a lot less than new. Otherwise I wouldn't have them. Another plus side is they are rebuildable.