Want to upgrade some power , but still be able to tow. I currently
have the Van Aaken box that I want to keep. It advances timing
so I don't need a box that advances the timing. I figure two choices.
Stack the Blue Chip APB fueling box with the Van Aaken,that way I can
turn off the APB when towing, or I can go with EDM 1.65 injectors and
sell my RV275's. Either way it will cost about the same $500 - $600. That
leaves me $1000 for a new clutch. What would give me the most power ?

 

The 1.6 injectors will give you about 50hp over your 275s.

The APB will add about 85hp.

 

you may get more power with the box, but the injectors will be smoother power and more consistently delivered across the rpm range.