Lordred wrote:but I also agree that no CAT should be required for 73
Agreed, but the competition is set in 1976. Not sure when mandates insisted on cats, and not just emissions numbers... but I bet 76 could be doable still.
Lordred wrote: Shame we do not have the option to equip smog pumps.

Such a shame, but we can dream, right? One day, maybe in Automation X we can adjust all belt-driven accessories, and make cars without power brakes, etc.

Also, I'm in huge agreement that emissions SHOULD NOT be a weighted stat, but a hard limit, pass/fail. HOLY SH*T, thank you LordRed, I missed that completely. There shouldn't be an opportunity for a cat to be inferior in every way, but just so damn clean at the tailpipe that it would sweep the contest. Think about it, when buying a new cat in 1976 I will wager that exactly zero consumers compared at tail pipe hydrocarbon and CO levels when buying their new cat - that was the EPA (or equivalent)'s job, and they had a pass/fail system, the same way cars do today. Titleguy, what you should do is (sorry, giving you homework) put together a handful of cars, rich, lean, etc., different engine configs, etc, body types (you're following by now) and chart and plot those cat's emission, find an average or mean that you agree with, maybe check out real-world numbers and make a set pass/fail emissions number for the contest.
I cannot lobby enough to remove that stat as a weighted variable!!!
EDIT: Alternative to the pass/fail - make a high/standard/low emissions bracket score sort of thing, like the regions/running costs do for emissions taxation. Normal is a pass, if it's over your determined "high" mark, then boom, big penalty to... something. Now, I don't think the 70s had a LEV sort of thing, at least not in the US that I know of, but if you want to give players a bonus for a super low emissions vehicle, like sub-500, or what ever, then go for it.