'36 Gas Tank in a '35

[jkflathead]

I am in the middle of a frame off restoration/build of a 1935 Ford Three Window Coupe. I am doing some modifications, 59ab, '39 transmission, columbia rear. It seems that using a '36 gas tank and guage instead of a '35 with the hydrostatic set up makes sense. The straight forward gas line seems like a better idea. I know that there is a venting issue. I have read some of the threads. Will the problem be solved by using a '36 filler neck? It is an inch longer than the '35. Will it work? I would appreciate any advice. Thanks. jk

[flatheadfan]

This is a super-common swap. Use your '35 neck and install a vent tube inside. Note pictures.

Tom

[jkflathead]

Tom, Thanks. Is this tube something that you made or is it available? jk

[flatheadfan]

I just used a 1/4" brake line tube. Any parts place will have them. Just bend the tube to match the inside curvature of the filler neck and place a weld on the inside top and bottom to hold the tube in place and your are done. Bedsides venting this tube will allow you to fuel the car much faster without spilling fuel all over your fender.

You cannot use a '36 neck, It just won't align with your '35 fender hole. In fact, don't use a common '35 reproduction neck they are also dimensionally wrong and won't fit a stock '35 fender without fender surgery.

Tom

[deuce lover]

The original 36 gas cap is vented.35 is not.

[jkflathead]

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Thanks.

[35fordtn]

I'll second what deuce lover stated. A vent tube is a good idea but not necessary. But a vented cap is a must! Most all new reproduction caps are vented.

[Don Rogers]

jkflathead, Here are some things to consider....All original 32-36 standard issue gas caps were non-vented (B-9030-A). The locking gas cap sometimes could be vented by removing a vent screw.
If you try to vent your 35 filler neck, one end of the tube must be vented outside the filler neck. Having both ends of the vent tube inside the filler neck may help when you fill the tank but does nothing when you put the non-vented gas cap on.
Here are some images that may help.