help with vacuum hose routing... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

tracterman2 · 03-02-2007, 09:55 AM

I'm going to try this one again...surely someone can help me with my vacuum hoses...a diagram or a picture...my sticker is gone and I would rather not do the trail and error thing...I have a stock 307 and a powerglide...the truck is a none a/c truck and doesn't have power brakes or power steering...it is a custom 10...if anyone cold help it would be greatly appreciated...I did add an HEI for realiablity sake the other day...fixing to put the carb back on, that is the 2 barrel by the way...going to put on all new lines...so I just need to know where they go...any help would be awsome...thanks.

dave2953 · 03-02-2007, 10:01 AM

I had/have the exact same motor/trans/carb. If you mean PCV, vac. advance, etc. I can help some. I routed PCV from the port at the rear base of the carb. Vac. advance goes to the line that is on the pass. side of just above the base. (circled) I ran my trans. modulator line to the port in between the carb and dizzy. Here is a pic for reference, and I hope this helps you out.

tracterman2 · 03-02-2007, 11:36 AM

yeah that helps...there are a few more lines I need to know about...I have a small modulator on the left side of the engine with two lines coming out of it...I have no idea what this does...I checked the FAQ section...surely someone has the emissions diagrams on here somewhere...that would be a good FAQ to put together...the diagrams for each year and engine trans configuration...I know there are alot of them...but that would be a good resource for the ones that are trying to fix up old trucks that have lost everything off of them... thanks for your help....I know the pcv and dizzy advance are the most important...we'll see what happens..I'm still hoping for that diagram though...lol

JimKshortstep4x4 · 03-02-2007, 08:36 PM

My 71 Service Manual has a different Emissions Diagram from your 70. Your 70 had the TCS setup on it and my diagram does not show the TCS. You need someone with a 70 manual to look it up.

Jim

03-02-2007, 09:55 AM	#1
tracterman2 Registered User Join Date: Jan 2007 Location: Nashville, Arkansas Posts: 96	help with vacuum hose routing... I'm going to try this one again...surely someone can help me with my vacuum hoses...a diagram or a picture...my sticker is gone and I would rather not do the trail and error thing...I have a stock 307 and a powerglide...the truck is a none a/c truck and doesn't have power brakes or power steering...it is a custom 10...if anyone cold help it would be greatly appreciated...I did add an HEI for realiablity sake the other day...fixing to put the carb back on, that is the 2 barrel by the way...going to put on all new lines...so I just need to know where they go...any help would be awsome...thanks. __________________ I'm Your Huckleberry. You Ain't No Daisy.

03-02-2007, 10:01 AM	#2
dave2953 Dave's not here, man Join Date: Jun 2004 Location: Winder, Georgia Posts: 2,000	Re: help with vacuum hose routing... I had/have the exact same motor/trans/carb. If you mean PCV, vac. advance, etc. I can help some. I routed PCV from the port at the rear base of the carb. Vac. advance goes to the line that is on the pass. side of just above the base. (circled) I ran my trans. modulator line to the port in between the carb and dizzy. Here is a pic for reference, and I hope this helps you out. __________________ - 2014 VW Jetta - 2015 VW Jetta - 1966 Ford F-250 Last edited by dave2953; 03-02-2007 at 10:21 AM.

03-02-2007, 11:36 AM	#3
tracterman2 Registered User Join Date: Jan 2007 Location: Nashville, Arkansas Posts: 96	Re: help with vacuum hose routing... yeah that helps...there are a few more lines I need to know about...I have a small modulator on the left side of the engine with two lines coming out of it...I have no idea what this does...I checked the FAQ section...surely someone has the emissions diagrams on here somewhere...that would be a good FAQ to put together...the diagrams for each year and engine trans configuration...I know there are alot of them...but that would be a good resource for the ones that are trying to fix up old trucks that have lost everything off of them... thanks for your help....I know the pcv and dizzy advance are the most important...we'll see what happens..I'm still hoping for that diagram though...lol __________________ I'm Your Huckleberry. You Ain't No Daisy.

03-02-2007, 08:36 PM	#4
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Re: help with vacuum hose routing... My 71 Service Manual has a different Emissions Diagram from your 70. Your 70 had the TCS setup on it and my diagram does not show the TCS. You need someone with a 70 manual to look it up. Jim __________________ 1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC



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