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One other comment on using a HD relay to provide a steady high voltage to the HEI? It will probably save you the trouble and expense of replacing your Luv's stock ignition switch. If you check out a lot of Luvs you will undoubtedly find many, many of them have replacement after market ignition switches. This is again because the stock wiring and ignition switches are simply insufficient to carry the amount of current needed by the HEI. Using the stock switch may work for a while however using a larger supply wire through a HD relay will provide a huge improvement in power in the upper rpm range where the stock HEI's suffer anyway, that's why MSD and Accel sell so many HEI ignition modules and high performance coils. When you have the opportunity, check out the testing done on HEIs, the stock units put out about 50K to the spark plugs at an idle, however this output drops off rapidly above 4-4,500 rpms. You won't see many stock HEI units in race cars!
Again whatever works for you is what is important! This is but one of the many reasons that this is such a wonderful site, we can learn from not only our own experiences but from the experieces of others, and perhaps save us all a bunch of money (and time). I've been doing these swaps for longer than I care to count and because of people like Old Rob and many others I continue to learn each time I browse the site!
Thanks Ben, and all of the others who have devoted so much time and effort to starting and maintaining LUVTruck.com !!!
scjconv

just bought everything for it about 2 days ago
it runs but spits bad
i need to change the spark plugs and do a few other tune ups to it
hopefully a.j. has a bunch of good sbc parts i could use as well
i'll be in cruces around the 27th or 28th of july for about 3 or 4 days with a pickup truck

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79' LUV

i as well used the stock harness,,,,9 years later still no problems.....

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When buying a used car, punch the buttons on the radio. If all the stations are rock and roll, there's a good chance the transmission is shot!!!

I have my ignition wired to a switch and a relay. 20amp Bosch relay. I could not find a 30 amp at the time. Parts Express has 30 and 40 amp relays.
http://www.parts-express.com/wizards/searchResults.cfm?FTR=Relay&search_type=main&WebPage_ID=3&searchFilter=Relay&x=0&y=0
You should be able to run the relays off the ignition switch. I have red you need 12 ga wire for the distributor. I am not sure how the Luv switch works but the HEI needs 12volts during cranking and running to work.

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75 Luv, 350 V8, TH350, Camaro rearend. New 1975 Luv Step side. Stock for now.
Grandmaster of the "Shade Tree" way.. I can't see the yard for all the cars. Come on down and we will sit on the porch and watch the grass grow.

Here is a 40 amp kit. http://www.autowiringsolutions.com/item.php?item_id=272&category_id=110

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75 Luv, 350 V8, TH350, Camaro rearend. New 1975 Luv Step side. Stock for now.
Grandmaster of the "Shade Tree" way.. I can't see the yard for all the cars. Come on down and we will sit on the porch and watch the grass grow.

Thanks PapaG! Appreciate you input on the relays, and you are right when you state that HEI ignitions systems require a constant 12 V for starting and running. And a 12 guage wire supply wire is needed, just look at any stock GM engine using one of the distributors
When I do one of these swaps I always install HD relays for the starting and for the ignition, just saves a lot trouble later on. I've read the other comments about not having to use these but it has alway's been the case with me.
As stated earlier in this section, the HEI is a good "medium duty" ignition, easy to install and maintain. But if you put one on a test machine you will quickly see it's limitations, esp at high rpms.

look up hooker headers they have a kit for v8 swaps u can use a h.e.i distributer but you have to beat the wall back a little. i did and it fit just fine u may need to tune the wall as u fit it use shorty headers and take your radiator in to your radiator shop and have them 4 core it .if there any good they can do it .

You'll be money ahead and less trouble buying a 19 x 22" alum radiator and installing that. The 4 row stock is marginal at best. Goto www.powerbyace.com and look at the instructions for a V8 LUV in the technical section.
Don't cut the upper radiator core support panel!

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The light at the end of the tunnel, may just be a train coming!