Throttle body size on a 351
 

I have a 351W going into a 93 GT. It has a cobra upper and lower, but other than that, it's mostly stock. I have 24 pnd injectors and I was planning on a 70 MM Mass air Meter and a bigger fuel pump. Do I need a regulator and would a 65MM Throttle Body be enough?

If you are using a stock cobra intake a 65 will be fine. A 70 will be ok to, but if you allready have a 65 why waste money. I would get a adj regulater because you may need to do some fine tuning. And yes a new pump would be a good idea to supply the new 351.

Wade:)

I don't have a 65 yet, all I have is the stock unit on the 93. I just don't want to go 2 big. I'm a carb guy, haven't messed with an EFI swap. I know using a carb that is to big for a motor is bad, wasn't sure about a T/B. Guess I'll look for a 65. I assume the stock T/B is smaller, right?

If you have not bought one yet get the 70mm, it will not harm your performance on a 351. It will give you some to grow if you do some mods like a head and intake swap. I THINK that stock is 60mm.