Hey US
If you figure out how to put a lifter in backwards let me know, like upside down?That won't work, and the lifters rotate in the block other wise it would wear out.But I'm a chevy guy so what do I know. As far as restrictors,I've read some articles that it's not a good idea because restricting the oil reduces the cooling on the springs.Here again thats on a chev. Good luck I'll be looking at this thread to see other response's