I know this isn't about a Boss block, but it is a stroker?! I am a new member of the forum, and I have a question for the performance engine builders. I recently bought an '89 GT with a 347 stroker and a Vortech supercharger, I initially had some problems getting it to run properly, but I found a broken wire on the MSD 7AL-2 that caused a problem. With that fixed it runs much better, but I am still struggling with a hesitation that I hope to fix by tuning the Anderson Ford PMS 4 box. That is a whole different question though, I have been noticing the oil filler cap loosening up when I drive it and last night i decided to open it up a bit, which caused the oil cap to blow off !! I suspect crankcase pressure due to no PCV installed, but I am wondering the best way to diagnose/cure the problem??