360 roller block and fuel system theory

[Inman789]

So my project (74 Cuda, auto, 360) was a stalled restomod without a drive train. Since it is a 360 car, I was able to source a couple 360 blocks. One is a 85 vintage with 1.88 valves, flat tappet, and fuel pump. The other is '96 roller, looks like 2.02 valves but no fuel pump boss.

I like the idea of the larger valves and roller so I have been thinking about the fuel delivery.

I like the Holley in take units with built in sender but they deliver around 58 psi with no return. I believe their reg and return would be in the tank.

So for the return, I am thinking of installing a good quality EFI to Carb regulator and route the return to one of the stock Cuda tanks that has either one or four vent returns.

Something like this one. Is their a better way to skin that cat?

Or, stick with the old school flat tappet and mechanical fuel pump and make sure I always run the appropriate oil for flat tappets (which is what I do in my 71 Chevelle)

Aeromotive 13220 Aeromotive EFI To Carb Conversion Fuel Pressure Regulators | Summit Racing

 

[Xcudame]

I vote for the 360 roller motor since neither of your engines is original. And I like your plan. It should work fine. Mopar went to the Magnum engines with roller cams for a reason, they're better!

 

[Inman789]

Thanks. You dont think the large volume returning through a vent line would be an issue? If I had a tank with the four vents, I could split the return line to two of them.....I agree that the roller upgrade would be worth the gamble. Thanks

 

[pschlosser]

is a return fuel line from the motor to the tank really necessary? this is kind of a pain to install and not every fuel delivery setup requires one. that said, the tanks with only one vent repurposed as a return line may create new issues with fuel delivery. if you're set on using a vent line, I vote going with an ECS tank with four vents. but even the OEM had the option of a pickup with return line fitting.

 

[Xcudame]

Unless I missed something, I thought it is a 74 Barracuda and it would have the ECS tank. The supply tube is 5/16" ID and the return line is 14" ID. Should work great with a Holley electric pump and the regulator he is looking at.

 

[Inman789]

It is a 74 but the tank that came with it (the previous owner was going to restomod it) doesnt have any vent line.

Not sure which way I am going to go at this point. I have the 85 engine with the timing cover with the mechanical pump so I am researching the different roller cam shafts (long and short snout) along with what Hughes has to see if I can use the 96 roller block and make it a mechanical pump engine. I may be way off base but I think it is worth digging.
Thanks all for your help!

 

[Xcudame]

Rock Auto has fuel tanks pretty cheap.

1974 PLYMOUTH BARRACUDA 5.9L 360cid V8 Fuel Tank | Shop Now at RockAuto

Fuel & Air Parts and More for Your 1974 PLYMOUTH BARRACUDA at Reliably Low Prices. Fast Online Catalog. DIY-Easy. Your Choice of Quality. Full Manufacturer Warranty.

www.rockauto.com

 

[Inman789]

Thank you. I think I found a way that may let me use my 96 roller block and have a mechanical fuel pump as well. Not have to deal with an electric pump.

Has anyone used the Hughes cam snout extension and retainer kit along with their fuel pump eccentric? With those two pieces from Hughes, it looks like I can use the timing cover off my 85 block that has provisions for a mechanical fuel pump.

http://www.hughesengines.com/Upload/productInstructions/HUG7013March2012.pdf

HUG 7013​

CAM SNOUT EXTENSION (SHORT SNOUT)

87-02 V6 & V8 EXTENDS LENGTH OF CAM SNOUT FOR FUEL PUMP ECCENTRIC

HUG 10003​

FUEL PUMP ECCENTRIC W/ MOLY

Fuel pump eccentrics are designed to fit engines equipped with a mechanical fuel pump. They are moly coated for extended