wheres the best place to get a set of the bb injectors? how much diference is there between the 6.9 and 7.3 pumps? will it be ok the way it is if i get the boost up to 13.3?

 

I have heard there is no difference between the 6.9/7.3 pumps. It is rumored the 6.9 pumps may have had the fuel screw turned up a bit more from the factory, but you can easily turn up the fuel on a 7.3 pump if you want.

Anything over 10psi without an intercooler and you usually start to lose power as the air is too hot. I wouldn't go over 10psi without head studs anyhow. Some guys will get away with 15psi on the bolts while others will blow a head gasket at 12psi. It's kind of a crapshoot and I like to err on the side of safety.

Find Russ(typ4) over on oilburners.net, he is selling pressure matched bb code injectors for just under $300 shipped and they come with a return line kit.