JWT ecu or S-AFC..??

[rn240sx]

My current setup is the jwt ecu with 370cc injectors and stock maf... I know im running rich, we all know this.. Right now Im limited to about 8psi with my T3/T04E on the 370cc inj and stock maf..I want to go up to about 12-13 psi on my ka-t. Question is, should I pay to upgrade to the 72lb jwt ecu setup, OR should I sell my jwt ecu ( with 370cc inj & stock maf) and buy 550cc inj and get a S-AFC and get better tunning..??If you guys recommend to do the afc route, what do i buy to control my timming when i start to go above the 7psi range..??

ThanksRobert98 ka-t