It is really going to be hard to beat the reliability you have with the current setup.
The sky is the limit for your intake choices.
single 2bbl
dual 2 bbls
3 2 bbls
single 4 bbl
2 4 bbls
3 4 bbls( larry's choice)
webers in side drafts or down drafts
and then there is the fuel injection choices
Webers are harder to tune and cost more.