Just bought a holley 502-6 on ebay.

plan is to run it on a 305 with lt4 cam / performer rpm / headers / 3in exhaust.

I have a romulator and PP2 and have been using tunercat and rt tuner so am happy to burn my own chips.

Unfortunately i live outwith the US and was wondering if there was anything else i needed to buy before i put it on.
I was thinking about the sensors/wiring/plumbing etc.

any help would be most appreciated.

might not be such a bargain after all.

 

Is the 502-6 the 670 TBI? If so keep aside for the time being. Put your motor together and dial it in with the chip. Than slap it on and re-tune it. It will be much eiaser to get the tune dialed in that way. More advanced burners can jump into it right away. I can't wait to see some numbers once your combo is complete!

 

Yes, its their 350 version of the 670 with the bigger injectors.

 

Youll want to consider a high pressure pump and converting the holleys FPR over to a VacAFPR. If Im having fueling problems with it then youll definatly have fueling problems with a good cam and a set of heads. If you dont plan on heads then a better pump is all youll probably need so the pressure doesnt nose off at high rpms. I think you may also have to modify the holley to work with your stock linkages. A search will bring up all the threads that have gone over this. Lastly, depending on your year, you may need to change out your tps connector to work with the holley.

 

holley has a catalog with all the sensors and harness connectors throttle cables and the like illustrated with photos. i dont believe the complete list is online. i would order catalog.

 

Yea I went on ebay and checked some out. I was supirsed to see how many of those things you can find right now. None were really priced that high either.