71 roadrunner gas tank sending unit

Technical Question and Answer - On topic to 71-74 Plymouth B-bodies only.

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EV2 340
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71 roadrunner gas tank sending unit

Post by EV2 340 » Sun Nov 26, 2017 1:43 pm

can someone tell me what size sending unit i need in my 71 340 roadrunner, is it 3/8 or 5/16, did small blocks take 5/16 inlet and big blocks take 3/8 or did it go by year, any help would be geat

71bird
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Re: 71 roadrunner gas tank sending unit

Post by 71bird » Sun Nov 26, 2017 2:41 pm

What size are the lines going to the front of the car? I think only the Hemi, and 6 pack got 3/8, but I can't swear to that.
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1972RM23
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Re: 71 roadrunner gas tank sending unit

Post by 1972RM23 » Wed Nov 29, 2017 12:16 pm

71bird wrote:What size are the lines going to the front of the car? I think only the Hemi, and 6 pack got 3/8, but I can't swear to that.

That's correct (maybe 440 4v too), but all others got 5/16"
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Re: 71 roadrunner gas tank sending unit

Post by 71440 gtx » Wed Dec 20, 2017 11:17 am

the 440 4bbl 440 6bbl hemi got 3/8 and 1/4 return line

340 360 383 400 got 5/16 line :beer:
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