Bigger brakes - what's available?

[Project1970]

Finally having the LS1 in the truck and running (I'd be out driving and washing it now if it weren't for an oil pan leak... *sigh*) has made me realize that the brakes on that truck, while not bad, really aren't all that great either. I think part of it might be I'm not getting enough vacuum to the booster, but even then they don't seem to stop the truck as good as they should with 350hp on tap. Especially since I had the "opportunity" to drive my mom's '02 Trailblazer EXT back-to-back, and the four-wheel discs do an excellent job of slowing that 5000+lb SUV down, much better than my '71-'80 front discs and rear drums slow down the 4000lb truck.

I've got Early Classic's 6-lug disc kit on the front. I know they make a big-drum kit for the back which I might go with (since the disc kits seem to be iffy as to parking brakes) but does anyone make a big-disc kit for the front? I imagine I'd be pretty happy to get the Trailblazer's discs and calipers on front if I could. Only thing is, that locks me into 6-lug for sure, and I want to go 5-lug eventually and get some Torq-Thrust IIs.