WOT hesitation/stall

[jsweet]

I'll start by saying I'm new to this site and to the Blazer "club". I bought a 72 Blazer a few weeks ago and I've already used this site for the wealth of knowledge you guys have.
The question I have is that the Blazer has developed an issue with full throttle. When you stand on the pedal, it'll either hesitate and then take off or just stall all together until you let off the pedal. It seems weird to me that it runs great at idle, half, or even 3/4 throttle but will have issues when it's all the way to the floor. Since this is new to me and I didn't put carb/motor in it, I'm at a loss on where to start. I thought of fuel filter but seems like it would sputter at WOT and not completely stall. Vacuum lines look good but I haven't checked pressures.
Any ideas?!