Two seperate quick questions...
 

I'm looking at switching over to HiRes in the future, as I am installing RX7 550cc injectors, but I only have one extra .22uf 50v capacitor. Is that going to work for the hardware mod?

Also I do not have the proper transistor for this circut:

http://www.msextra.com/manuals/MS_Ex.../LowVTacho.GIF

All I have is one extra 2N3904FS-ND left over (the one that goes in Q6-8, Q10, Q13-15, Q19, and Q20). Would that work?