Fuel line o-ring - Intake manifold swap

[bornchevy]

Today I will be starting my intake manifold swap. I am putting on a Edelbrock 3704 intake manifold (got for $100 brand new in box), Trans-Dapt 2734 Smooth-Bore Throttle Body Spacer ( Paid $15 brand new in box, JEGS 15410 TBI Fuel Injector Spacer (Don't remember what i paid but brand new in package), 88-91 steel braided fuel lines (Paid $7 for both lines and all brackets from pick a part. If you pull them leave the bracket on or they will charge you for the bracket also.) and relocating some of the items on the intake manifold. But the only thing i do not have is the o-rings for the fuel lines and fuel line to throttle body adapters, They seem to be a type of plastic. Does anybody know where to get these. I cant seem to find them on anybody's website. Any help is greatly appreciated.

 

[someotherguy]

I've never had to replace the 'washers' or whatever you wanna call 'em from the adapters to the TBI main body, under most circumstances you would never remove these. I do know the O-rings from the lines to the adapters are readily available at almost any parts house for just a few bucks, in a little kit with both sizes. Standard #SK18, BWD/Carquest #27478.

Looks like if you really need the washers, they can be had with some of the full-blown TBI rebuild kits, about $20ish. Probably comes with those fuel line O-rings, too.

Richard

 

[bornchevy]

Well if they come with the TBI rebuild kit then I guess I will be doing the TBI mods this weekend as well. Thank you. I will have some pictures up tomorrow or the next.

 

[bornchevy]

FYI if anybody wants to do the 88-91 braided fuel line conversion make sure the return line will reach your factory hard line. Ran into this problem about an hour ago.

 

[bornchevy]

So I found out not all gmt400s were created equal. I found 88-91 trucks with hard lines and braided lines. I think I found a fix. I'll post pictures when I'm done

 

[bornchevy]

If anyone is swapping their hard fuel lines for the braided fuel lines I strongly recommend finding a donor vehicle that matches yours in body style. Single cab, extended cab, short bed, and long bed, Make sure the truck is a match to yours and grab the fuel lines from the tank to the throttle body. When I first got he braided lines I only got them from the throttle body to the fuel filter, the return line wound up being a foot to short, I paid $7 for them. The second set I grabbed yesterday was the complete lines from the TBI to the Tank Also $7. After I pulled them from the truck I reconnected them all back togeather to make them look like one piece and the cashier said $7 bucks.

If you don't happen to be able to find the right match There is a way around it. Currently my truck has the fix but Im not sure how stable it is. I got the tube with the mail fitting on one end and the brass fitting on the other at dumba** zone and the female I cut off my original return line and used the brass coupler to connect the two after cutting the long tube down a couple inches. I will get better pictures of the final install this afternoon.

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