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I would suggest a 3/8" min supply and the same for
the return.. if your going with EFI it will need a
good return.. I myself run a 1/2" supply and return
with my set up.. it was carbed but now I run a Holley
multi point EFI and the system is good up to 700 hp..
if I were to go more than that I would need a bigger
pump and injectors.. the rest will work... the issue
with a 3/8 line that I dont like is the bends.. if
you get any kink at all it reduces the flow... the
ID is already 5/16" on a 3/8"
EDIT
Also... if you keep the stock tank I would add a sump
to it... injection doesnt like to have air sucked
in and if you run low in the tank it will suck air
in

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Bigger is better when it comes to fuel line sizes, my next race car will have a 5/8 O.D. fuel ine with a 1/2 minumim return line, that is Carbureted, not EFI I'll put on what ever size the fuel stystem, probally Magnafuel, company recommends

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Seems as though bigger is better as you never know where you will end up. I have noticed there are more hose choices available these days that still meet the track rules. You are not required to buy these stainless braid anymore. Any experience with the push-lock hose? Seems priced right and would think it would be easy to work with? The price difference between -8 and -10 is pretty minimal...Not sure if it is compliant with the new fuels though?

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I havent used any push lock but I do use the black
braided hose with alum fittings... if you run a hose
that has a Viton liner its good for any fuel... I
use the standard black braided and its good for pump
gas since thats what I run which can have 10% ethanol

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Seems as though bigger is better as you never know where you will end up. I have noticed there are more hose choices available these days that still meet the track rules. You are not required to buy these stainless braid anymore. Any experience with the push-lock hose? Seems priced right and would think it would be easy to work with? The price difference between -8 and -10 is pretty minimal...Not sure if it is compliant with the new fuels though?

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I'm using Aeroquip push lok hose and pump gas with no problems.

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I used the steel lines (3/8 supply, 5/16 return)EFI pumps do not like to suck.

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I used the steel lines (3/8 supply, 5/16 return)EFI pumps do not like to suck.

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I don't think any electric fuel pumps like to suck, they push better than suck usually.

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Pumps dont suck.. they create the negative pressure
so atmospheric pressure can push in the fuel(or oil
like in a oil pump)

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I used the steel lines (3/8 supply, 5/16 return)EFI pumps do not like to suck.

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I don't think any electric fuel pumps like to suck, they push better than suck usually.

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Pumps dont suck.. they create the negative pressure
so atmospheric pressure can push in the fuel(or oil
like in a oil pump)

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I used the steel lines (3/8 supply, 5/16 return)EFI pumps do not like to suck.

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I don't think any electric fuel pumps like to suck, they push better than suck usually.

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Pumps dont suck.. they create the negative pressure
so atmospheric pressure can push in the fuel(or oil
like in a oil pump)

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So while its in its carb version am I going to be able to pull the fuel out of the tank using the stock pickup.

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Yes but if your running more power than stock a larger
pick up would be nice(depending on whats there now)

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I used the steel lines (3/8 supply, 5/16 return)EFI pumps do not like to suck.

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I don't think any electric fuel pumps like to suck, they push better than suck usually.

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Pumps dont suck.. they create the negative pressure
so atmospheric pressure can push in the fuel(or oil
like in a oil pump)

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So while its in its carb version am I going to be able to pull the fuel out of the tank using the stock pickup.

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Yes but if your running more power than stock a larger
pick up would be nice(depending on whats there now)

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I used the steel lines (3/8 supply, 5/16 return)EFI pumps do not like to suck.

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I don't think any electric fuel pumps like to suck, they push better than suck usually.

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Pumps dont suck.. they create the negative pressure
so atmospheric pressure can push in the fuel(or oil
like in a oil pump)

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So while its in its carb version am I going to be able to pull the fuel out of the tank using the stock pickup.

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Yes but if your running more power than stock a larger
pick up would be nice(depending on whats there now)

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Moderate size carb electric pumps seem to handle the stock pickup OK... many members have good luck. As posted above, a bigger pickup is better. 3/8" minimum, 1/2" preferred. Somebody with more experience will likely post good combos.

EFI pumps just don't work very well or long with the restriction of the stock style pickup. I toasted a couple as have others before going to pump in tank (or sump). Fuel system upgrade for EFI can get involved so maybe best to pick a pump to cover the carb for now and deal with the EFI requirements later.

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The stock replacement steel lines (3/8" supply, 5/16" return) work great on the pressure side of my EFI setup. Mine is a ~550 HP 496 with pump rated for 700 HP. Would probably work fine with higher HP as long as the pump has an un-restricted feed (pump in tank or sump with -10 lines or bigger feeding the high pressure pump inlet).

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I have 1/2" push lock hose on my car from regulator to carb and it works great (1/2" hard line from cell to regulator). It is a bit of a pain to "push" the fittings into the hose, but after the trial and error approach, I found that putting the end of the hose in boiling water for 15-30 seconds then jamming it on the fitting worked best.

My car is on e85 if that helps.

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