I just had to send back a K+N filtercharger (element and assembly) that I bought for my 70 Jimmy which has a 350 w/ Quadrajet. The unit I sent back was 14" in diameter and 6" in height. The firewall got in the way before I could even place it over the carb. The next size down according to Summit is 11" in diameter and 3 3/4 in height. Anyone out there running a bigger element than this on a 69-72 Blazer/Jimmy with a Quadrajet ?