I currently have some lucas 009s(42.5) I am thinking of getting some Bosch 60# high impedence injectors, or should I go bigger and get a convertor box. here's a list of important mods.

353 ci Lt1 9.0:1 cr
Twin Ic'd D1sc (15 psi)
224/236 114lsa cam
Afr 190 heads

 

Are you running out of fuel? Unless you are unable to get the AF ratio where you want it with the current injectors there would be no reason to get larger injectors. Assuming you need larger injectors, I'd advocate for the impedance converter as the low-z injectors operate much better at low load (short pulsewidths) than comparable size high-z injectors.

Rich

 

FYI: We have very similar mods and I had to go up to 72# to get the fuel I needed..

I Got the impedence converter and LOW-Z 72's and loved them both..

 

Yup!