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#1
08-12-2018, 11:48 PM
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Fuel return on ‘68 Lemans
Not sure why I never noticed it before but was checking on the rubber hoses by tank and fuel pump on both 68 Lemans verts. One of the cars which is a manual shift, low mileage original engine 350 265 hp and has one steel fuel feed line while our other ‘68 Lemans, low mileage, original drivetrain (speed M-20 Muncie) 350 320hp has a smaller steel return line (along with the steel fuel feed line). Was this a 350 HO performance only thing? Do 68 GTO’s have the return line as well? Both cars built about a week apart in Arlington, Texas.
Thanks
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1968 LeMans conv. 350 HO - 4 speed triple white (hear it idle here) https://www.youtube.com/watch?v=eVmq...ature=youtu.be 1968 LeMans conv. 350 - 4 speed Solar red/pearl |
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#2
08-13-2018, 08:11 AM
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In 69 the criteria for a fuel return line is having a 4bbl and/or AC. Sounds like it was the same in 68 based on your two cars.
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My Break Away Squad 1969 Fbird (Base, 350 & Sprint Cvt’s - 400HO & TA Hardtops) 1969 LeMans (2dr & 4dr Hardtop and a Cvt) 1969 LeMans Safari 2 seat Wagon 1969 GTO (2 Cvt, 2 Hardtops & Judge Hardtop) 1969 Catalina (3 Cvt’s & a 2dr hardtop) 1969 Ventura 2 Seat Wagon 1969 Executive 4dr Sedan 1969 Bonnie Cvt 1969 Bonnie 3 Seat Wagon (2 of them) 1969 Bonnie Brougham (4dr Hardtop & Cvt) 1969 Grand Prix SJ (2 of them) 1969 2+2 2dr Hardtop (Canadian model) |
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#3
08-13-2018, 09:00 AM
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Yep, I was under the same impression. AC cars got a return line in 68. My 68 AC equipped, Arlington built GTO has the return line.
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#4
08-13-2018, 04:10 PM
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My 68 RA II manual trans (non-A/C) GTO has the fuel return line.
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#5
08-13-2018, 04:43 PM
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Same here, 68 GTO, 11-B build date, Kansas City car, manual, non AC with the return line.
Frank
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 Poncho Huggen, Gear Snatchen, Posi Piro.  
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#6
08-13-2018, 05:12 PM
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I remember looking this up in the MPC books and found the return line listed for all 1968 T/8 applications without any notations for options such as transmission, A/C etc
However, I have heard of several examples of V8 cars from 68 that only had the one line so I am not sure why/how they exist. There must be some reasonable explanation....just not sure what that may be. Curious to find out though.... Sent from my SM-G930V using Tapatalk |
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#7
08-13-2018, 06:10 PM
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2-BBL vs 4-BBL, about the only thing I can think of.
Frank
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Poncho Huggen, Gear Snatchen, Posi Piro.
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#8
08-13-2018, 06:50 PM
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Quote:
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#9
08-13-2018, 08:00 PM
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As I mentioned, a car with a 4bbl and/or AC got the return line. A 2bbl car without AC had the single fuel line only. Also iirc (I’m at my cottage so can’t check my books) the single fuel line is also smaller (dual line is 3/8” with 1/4” return versus 5/16” without a return line).
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My Break Away Squad 1969 Fbird (Base, 350 & Sprint Cvt’s - 400HO & TA Hardtops) 1969 LeMans (2dr & 4dr Hardtop and a Cvt) 1969 LeMans Safari 2 seat Wagon 1969 GTO (2 Cvt, 2 Hardtops & Judge Hardtop) 1969 Catalina (3 Cvt’s & a 2dr hardtop) 1969 Ventura 2 Seat Wagon 1969 Executive 4dr Sedan 1969 Bonnie Cvt 1969 Bonnie 3 Seat Wagon (2 of them) 1969 Bonnie Brougham (4dr Hardtop & Cvt) 1969 Grand Prix SJ (2 of them) 1969 2+2 2dr Hardtop (Canadian model) |
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