The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Firewall routing questions and points distributor wiring for the purests 71-C10 A/C

**Ironangel** · 01-11-2017, 04:45 PM

This might help http://farm4.static.flickr.com/3645/...c2a8064d_o.jpg
The HEI can be wired from one of the ignition unfused terminals located on the fuse block. Heres a pic of the fuse block with highlighted markings,

I ran my HEI, Tach, and rev limiter wiring through the grommet used for the oil pressure line, it has room for added wiring.
Most of the underhood wiring comes from a terminal block located near the master cylinder hydrovac canister below the speedometer cable outlet.

Sorry for the big pics, the factory distributors had a resister wire used to keep from burning up the points, you cannot use that wire for HEI distributors because the resister wire limits voltage. You must run a dedicated 10 or 12 gauge wire that supply's a full 12 volts to the HEI. The unfused terminals on the fuse block do this as well as being keyed through the ignition switch.

01-11-2017, 04:45 PM	#3
Ironangel Senior Member Join Date: Feb 2010 Location: Falls City, Nebraska "100 Miles From Nowhere" Posts: 2,219	Re: Firewall routing questions and points distributor wiring for the purests 71-C10 A This might help http://farm4.static.flickr.com/3645/...c2a8064d_o.jpg The HEI can be wired from one of the ignition unfused terminals located on the fuse block. Heres a pic of the fuse block with highlighted markings, I ran my HEI, Tach, and rev limiter wiring through the grommet used for the oil pressure line, it has room for added wiring. Most of the underhood wiring comes from a terminal block located near the master cylinder hydrovac canister below the speedometer cable outlet. Sorry for the big pics, the factory distributors had a resister wire used to keep from burning up the points, you cannot use that wire for HEI distributors because the resister wire limits voltage. You must run a dedicated 10 or 12 gauge wire that supply's a full 12 volts to the HEI. The unfused terminals on the fuse block do this as well as being keyed through the ignition switch. __________________ Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" "Be American, Buy American" Last edited by Ironangel; 01-11-2017 at 04:52 PM.