Ok, first off... I've been reading about every brake swap ever imagined for about the past 2 hours I know that the 91 EX brake MC (15/16) will directly bolt onto my 89 CRX Si booster. I know this because i used to have one on my car and I didn't like the increased pedal effort with the stock booster. I'm sure you know already, the stock MC for the CRX is 13/16. Without going into too much debating about brakes, I still have a couple questions tho: 1. The 91 EX brake booster is larger than the stock 89 CRX Si booster, right? 2. Will the 91 EX brake BOOSTER bolt directly onto my 89 CRX Si? (assuming I can bend the harlines to fit the new position) 3. If using the stock MC (13/16) with the larger booster from the 91 EX, would the pedal effort feel absolutely too soft/spongy? Yes, I realize that this combination will not actually increase braking performance...please don't go there. lol. I am making an effort to lessen the pedal effort slightly in the rex. It's daily driven and it always has had a bit stiffer pedal feel than I'd like. Thank you!