Add 273's, 340's & 360's to the "318 Race" ?

I’d like to join with my 72 Duster but I can’t say I’ll get to the track for sure. I’ll have to go through the list and see what all I’d have to deduct.

So far my index says I should run a 14.2 but I haven’t figured any altitude and I don’t know what my car weighs but it should be a fair amount under 3300. I also currently have a 3.23 gear but will be swapping that for a 2.76 sometime.

Forgot to state that I have a carbed 5.9 magnum and an ax-15 5 speed.