1966 mustang 86 block

[19thomas66]

going carb so from my understanding has to be 85 dist but i have no wiring harness how would i hook up the dist. to the ignition control modual?

 

[tweet66]

If using the 85 dizzi you can hook it up similar to the duraspark conversion diagrams. There are three wires, black, green,& purple. With an MSD the black isn't used & the purple and green wires connect to the magnetic pickup harness from the ignition box.

 

[19thomas66]

so i have to go aftermarket ICM?

 

[tweet66]

Essentially yes. The 85 dizzy is a magnetic pickup style unit. I "assume" you could switch the plates internally to use points but why bother... Even the stock Duraspark ($25 at most part stores) is better than having to occasionally adjust points. I used a duraspark box on my engine break-in/test stand with a 70's granada V8 duraspark dizzy.

 

[19thomas66]

ok i kind of understand sorry first build like this.
my dist has a 3 prong male and the icm has a 2 prong and 4 prong male plugs so the confusion is how to hook them up... do you hnow what would happen if i did it incorectly? would it fry them or just not start?

thank you for your help

 

[tweet66]

What icm are you currently running? Most of them support a magnetic pickup style dizzy. Without knowing I would assume, again, that one of the sets of wires supports a mag. pickup distributor.

 

[19thomas66]

currently none gotta buy 1 that was a stooock replacement part i looked at and decided to wait and make sure i get the correct part

 

[tweet66]

Personally I'd buy an Duraspark for the money or an MSD 6 if you want it a little more performance oriented. Jacobs makes a nice setup but at almost twice the cost of the MSD... Summit's cd ignition box looks pretty good as well but I've no experience with it.

 

[19thomas66]

you wouldnt happen to have a part number or will and duraspark icm work?

 

[19thomas66]

its a non performance cheap build lol i have a bored out 351 i am waiting on saving money to build a 428 stroker out of with clevland aluminum heads and E-boss intake

 

[tweet66]

The duraspark any parts store will carry. Just ask for it from any V8 ford from 75 to 85. I pick them up from the junkyard all the time for about $5 our so. Haven't had a bad one yet.... When you get it make sure irt has the blue strain relief connector were the wires come out of the box, it's the"updated" version.

 

[tweet66]

Heres Mustang Steve's duraspark conversion
http://www.mustangsteve.com/conversion.html

 

[19thomas66]

thanks that helped alot i should be able to get her goin soon

 

[tweet66]

No problem.

 

[Loup-garou]

its a non performance cheap build lol i have a bored out 351 i am waiting on saving money to build a 428 stroker out of with clevland aluminum heads and E-boss intake

What cam and heads are on the '86 block - all stock? Just thought I'd ask, since the '86 is the oddball with flat-top pistons and no valve reliefs.

 

[tweet66]

The 86 block I have has flat tops and the "turbo swirl" heads. Actually the head design wasn't a bad idea to promote better atomization in the cylinder, but the flat tops didn't allow for a lot of cam lift. I believe the max was around 0.450" possibly less...

 

[19thomas66]

stock cam 351 heads from a 94 bronco i think or somewhere around there

 

[2+2GT]

going carb so from my understanding has to be 85 dist but i have no wiring harness how would i hook up the dist. to the ignition control modual?

Your basic premise is wrong. You can use any distributor you like, even a stock 66 dual advance distributor, available anywhere. Since you have a roller cam engine, you would need to put a steel drive gear on it, but that's actually pretty easy to do.

 

[Loup-garou]

stock cam 351 heads from a 94 bronco i think or somewhere around there

The later heads should be okay with a stock cam and those un-notched pistons - but you might want to confirm it by mocking everything up and measuring the piston - valve clearance with modeling clay.

 

[Loup-garou]

going carb so from my understanding has to be 85 dist but i have no wiring harness how would i hook up the dist. to the ignition control modual?

Be careful with rebuilt distributors from the big auto parts shops; I've seen ones marked for the '85 5.0 come out of the box with iron gears on them.