Does anybody here run a vacuum pump on their street car? Are there any issues with running one on the street? I've read both yes and no. I'm trying to fix what I believe is a crankcase pressure issue on my car causing my rear main seal to leak. I have a crate 528 hemi in the car and it has a moroso positive locking breather (part # 68788) on each valve cover and no pcv system. The breathers are just vented to open air; not hooked to a evac system in the headers, as I've read they don't work well on street cars with a full exhaust. I'm believing that this is causing my issue and thought about running a vacuum pump to relieve the crankcase pressure. Any real world experience on street cars and how well they hold up? Thanks for the help