['68 Newtricks]

I like Special-K's idea of running the truck onto a couple small ramps. Open the garage door, put in neutral, roll out and start. Best way to do it.

If you run cats, they need to be as close to the cylinder heads as possible. Running two small ones at the collector will work best for cutting down on morning smells. The larger cats will take longer to heat up and thus longer to be effective. Neither small or big cats will help contain the smell in the garage, just not enough time for them to heat up.

Do the ramp thing or exhaust fan on a timer. I think you'll be happier with the outcome than changing your exhaust.