I've got a '68 400 YT car with all the original items on it as far as I can tell. A couple things I'm curious about though. 1) the 1111270 distributor has a single port vacuum advance, is that correct or should it have the two port unit? 2) I've got a PK code air cleaner without the chrome lid (the rocker covers are chrome)...my build sheet tells me the car came with option 731 the Heavy Duty air cleaner, do I have the correct unit or should I have the PR code chrome lid unit?