Coil & cap upgrade

[Geektrucker]

So my 81 250 Inline 6 has an older round external type coil.. I'd like to replace it / upgrade to an in-cap coil. Does anyone know of anything special I need to do other than replace cap & rotor, buy the coil, and wire in the power feed?

 

[DoubleDingo]

I'm sure they make HEI for I-6's. As far as I recall way back many moons ago, when I swapped in an HEI to a points trucks, it was exactly what you mentioned. Just need the new distributor, coil, and etc., wire in the power and get new spark plugs or just re-gap them and wires. New plugs would be good so you're getting full spark unless you've already switched them out, then just re-gap them.

I'll be doing this very swap, but to a v-8 truck soon. For mine it's going to be new cap, rotor, coil and plug wires. I already have the new plugs. I like the HEI setup because it has the tach terminal built-in the cap and coil.

 

[MadOgre]

A 4.3 V6 will use the distributor you want with 6 reluctors and then you just designate the cap terminals according to your firing order.

 

[DoubleDingo]

A 4.3 V6 will use the distributor you want with 6 reluctors and then you just designate the cap terminals according to your firing order.

Sounds like a cool upgrade.

 

[Geektrucker]

Do I need to replace the entire distributor, or just cap, rotor button, & coil?

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[Geektrucker]

A 4.3 V6 will use the distributor you want with 6 reluctors and then you just designate the cap terminals according to your firing order.

The whole dizzy from a 4.3 will fit into the Inline 6? Or just cap, rotor etc.?

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[DoubleDingo]

Do I need to replace the entire distributor, or just cap, rotor button, & coil?

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It's the whole thing. For a v-8 anyhow, the cap is bigger to house the coil in the cap. Probably the same for an I-6.

 

[DoubleDingo]

The whole dizzy from a 4.3 will fit into the Inline 6? Or just cap, rotor etc.?

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My guess is the whole dizzy needs to be acquired.

 

[MadOgre]

I actually do not know if a V6 dizzy will fit. Only one way to find out though. Take some measurements of your I6 dizzy and then go to the junk yard and see, if it looks like it will interchange then take one home to see if it will.