So I recently got my 63 P/U going. It's got the following mods:

Forged 5.7
Stock LS6 heads
223/228 108/108 XER
Edelbrock 1 3/4 stepped 1 7/8 HVMC headers
3" X-pipe to dual cut outs
LS6 intake
Stock TB
Stock Pulley
4L80E with stock verter
8.5" 10 bolt with 3.73's
Heavy steel wheels

It put down 362rwhp and 348rwtq. I'm currious to know what kind of HP does the 4L80E rob compared to like a 60E and say a F-bods M6. I was shooting for a little higher numbers.