i have a non airbag 89 mustang... whats the difference between the 90-93 and 87-89 cluster besides the little airbag cut out (rounded bottom )... do both fit inside an 89 mustang without airbags?... i'm only asking because i'm in the market for one for my 4cyl conversion and i want to get the right one the first time... any help here?

so the 85 looks like the easiest and cheapest way to go for now... since setups with 140's are going for like $175 for the 87-89 cluster
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