Looking for info on Throttle Body upgrade options.

1990 LX 5.0 HO
Installed now:
BBK Cold Air intake
BBK Shory Headers
BBK H Pipe
Flow Master 5 series mufflers
Flex A Lite electric fan
MSD 6ALN ignition Box
Stock injectors
Stock Fuel pump
Stock Fuel rails
Stock CPU


Looking to push the HP a bit without a big disasembly of the intake.

I have heard horror stories of adding a larger Thottle body and screwing up performance with out adding other parts.

Just want to poll the list for the best idea on how to proceed.