Hey kecker,
I always saw Stevie Ray playing a strat, using the neck pick up, and the middle. The pedal will help some, and I would suggest cranking the lows on the amp. I prefer 212 cabs, and start out with a really beefy clean tone, then I'll add the pedals to the mix.

I was playing country licks through Forrest's amp, using the bridge pick up on a tele. That calls for a bit more twang than blues, but you should be able to get what you want from that amp. Try the lows at about 7.5, the mids at 5, and the treble at 3.5. Don't forget to use the neck pick up on the strat, or the # 2 position. When you get that beefy clean tone, the other effects are just icing on the cake.