I just changed out the 305 tbi for a 350 tbi but we for some reason kept the intake from the 305 and put on it, it seems to be lacking a lot of power, i also think my distributer may be part of the problem but does anyone know if that intake would cause any problems?? ps. the reason we kept the intake is because the 350 we put in was carbureted!

 

The Intake and TBI are the same. The 305 uses 55 lb/hr injectors (White/Green) while most 350s use 61 lb/hr units (Orange/Black). You need 2 350 injectors, a 350 ECM, and a 350 knock sensor. Your power will be much better with those 4 items.

 

Thanks, will work on getting that all switched out. hopefully it comes back to life after all that.

 

for the ECM can you just switch out the PROM or do you need the whole black box?

 

It depends on what you are doing if you put in a 350 and keep the same fuel system you just need to change the injectors if you switch from tbi to tpi you can just change the prom and injectors to a 350