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Old 01-14-2013, 11:14 AM
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305 TBI to 350 Carb

I'm going to remove my 305 TBI and put in a Carb 350. I know that I do not want to run an electric fuel pump with a pressure regulator. What all will I need to do to run a mechanical fuel pump? If anyone has done this swap, what issues have you ran into? How did you fix them?

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Old 01-14-2013, 11:32 AM
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I did this same swap only I left the 4.3 in it. You can easily use the factory electric pump without hassle. All you need is the Holley Bypass style fuel pressure regulator which makes the job easy. These go for around $70 at summit racing. If you want to go with a mechanical pump then you'll need to run a new fuel line to it from the location of the fuel filter up then run another line for the bypass. I've seen some leave the electric pump in the tank disconnected and run the mechanical but if it were me I would remove the bed, yank the assembly out and chuck the electric pump and figure out a way to run a line with a filter on the end. So as said, staying with the electric and running a bypass regulator makes the job much easier as if did this way you can mount the regulator to the firewall and add a small amount of fuel line to the line already present after doing some rebending.
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Old 01-14-2013, 03:48 PM
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Thanks for the info @DoubleVision. I have two more questions. If I remove the electric fuel pump what about the fuel sending unit. Do I need to buy another one or will the current one work? How does removing the fuel pump affect my truck since it has dual tanks?
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Old 01-15-2013, 06:25 AM
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i would recommend keeping the in tank pumps. using the holley bypass regulator wont make a difference running the 2 tanks. tbi pumps can support 300-350 hp with carburators with the regulator
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