Looking for vacuum diagram of a 305 chevy el camino 1979 -all the diagrams are very small and hard to read- this is the worst year with all of the emissions hoses and vacuum switches and air pump ect

https://www.autozone.com/diy/repair-guides/gm-full-size-trucks-1970-1979-repair-guide-vacuum-diagrams-repair-guide-p-0996b43f80cb0d10

check this outhttps://www.elcaminostore.com/el-camino-emission-and-hose-routing-decal-305-c-i-5-0-automatic-transmission-california-code-xju-1984.html

www.gmheritagecenter.com/docs/gm-heritage-archive/vehicle-information-kits/El-Camino/1983-Chevrolet-El-Camino.pdf

Wow, quite an undertaking. I had an '81 El Camino and wish I had never sold it. Originally it had a 267 c.i. V-8 with a Rochester 2bbl carb. I put in a Chevy 350 4-bolt main crate engine, Edelbrock intake and carb, and Hedmann headers (it ran like a scalded dog LOL). My advice is to look for a Haynes manual covering the '71 model year. They have complete wiring diagrams in their manuals, but the wire routing will be up to you. Good luck.

the parts store or the chevy dealer with a service center can print one out for you

We do not have these diagrams, you can only get them from the factory service and repair manual. You can access the manual and all factory info at this site for a small access fee that covers one year. www.alldatadiy.com have no affiliation with the site just passing on the info to you.

Yes, the engine will swap fine, for the vacuum lines Go to Autozone.com, become member, will give you repair manual,location of parts,diagrams.

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Fig. 100: Chevy 305 (5.0L) V8 engine-federal with automatic transmission alternate



Fig. 101: Chevy 305 (5.0L) V8 engine-California with automatic transmission alternate

try a chilton repair book should have the diagram you need

Fig. Fig. 17: 1977 305 V8 engine-2bbl 49 states