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Discussion Starter · #1 · (Edited)
1970 stock SBC engine convertion from points to HEI is started.

HEI now on the engine, will try to figure out the wiring needs.

Which spark plugs do I use?

SCHURKEY replied:
The first thing you need is the right plug to fit the cylinder head. So you're pretty much stuck with a gasketed plug.
You'd probably keep the same heat range.
Next, add a projected tip if there's one available AND if it fits your combustion chamber.
Lastly, you want a plug that would allow a .040--.045 gap.
Depending on the gap--that may (or may not) be the same plug you're using now.

Thank You Schurkey...

Question for those who have done this upgrade:

1.) Where is the thread about wiring?

2.) What should the timing be set at?

3.) What spark plugs do YOU use? I like NGK but will take any advice.
 

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Yep, .045" for HEI. And I've heard good things about NGK but I run AC's. Just fine, $1.99 per.
 

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wiring is easy- either remove the stock resister wire at the bulkhead with a normal wire that provides full power to the coil, or run a wire to a terminal at the fuse box labeled "IGN".
timing should be set at whatever the old distirbutor was set at to start out.
use whatever plugs you used before, but open up the gaps to .045 or so.
 

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Discussion Starter · #4 ·
Thank you Derrik,
It was so easy, even a Ford guy might do it.

Sorry, I'll be good.

Now that it runs so nice, I want headers just for the sound...

It already has dual exhaust, no 'H', no 'X'.

Which vendor has the best deals?

PS: it will not go out in the winter road salt.
 

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Discussion Starter · #7 ·
Thank you Derrick, Rick and Jay.

Runs smoother than ever before, starts easier, exhaust smells better.

So Happy,
Charles
 
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