If your Eric Marshall chip is not too old... it has all the adjustments you might need. I can't imagine that just changing sticks would make the engine require a drastically different amount of fuel.....at least not enough difference you couldn't retune the chip (with Directscan or ScanMaster).....
ported heads... combined with significantly different turbo size.... or significant boost level change...... then you might need to get it tweaked.... but IMHO.... not with just a stick change.