$1k to spend on motor, suggestions?

[cochino12]

I need to wake the Blazer up a little bit and need some suggestions, I dont need a total drag car but want something similar to my old 85 c10 with zz4. Right now it's a bone stock 350 runs great no smoke supposedly only has about 75k orig miles, th350 w/shift kit, 2:73 rear gears. I"m only looking to spend about $1000-$1300 on motor upgrades (exhaust to come later).

I was thinking of getting some vortec heads, intake, and cam and later I'll swap the highway gears for some 3:73's. Its mainly a weekend driver so not really worried about mileage, needs to pass smog, and I'm in Denver if elevation matters. So any suggestions?