Toggle switch instead of Keyed switch

I have read one or two posts about replacing the key ignition with a toggle switch.

My son thinks its a 'neat' idea to do.

My wife thinks it would be easier on her thumb to start the car.

I know it loose the interlock on my '89 turbo vert, unless I kept the key for "looks"

Any suggestions on what type of toggle ( amperage) and where to place them?
Three switches? acc, ign, start?

I thought an "easy" button from Office Depot ( or is it Staples) would be fun.

John in Baltimore