I spoke with Ron at fiber concepts in Pennsylvania he told me to post on nasty Z 28, to get info on thr clearance we have a 572 GM crate motor in our 73Z 28 wanna know if anyone has used his L88 hood with that set up or even a three or 4 inch cowl hood looking for info so I can order the right hood once also laid at 6 foot level across fender to fender it measured 2& three-quarter inches at the back of the air cleaner and 4 1/2 inches at the front of the air cleaner if those dimensions help any input would be appreciated thank you Also the air cleaner is the low type