Todd told me they were used on a 511 in a roadrunner and running 9.80’s. What I found later was someone who knew the car said it was a well sorted track champion for like 20yrs. If that is true, then that motor more than likely runs same as mine. Your right, it is hard to find the 270’s except on eBay. Not going there. Best bet is a pair of fully ported -1 with new headers. No whining here, just want people to understand the max wedge victor is not all that. Just talk to any Mopar shop that has tried them. I have.