Spark plug help 9.5:1 532 d3 iron heads,

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Spark plug help 9.5:1 532 d3 iron heads,

Post  TravisRice on July 4th 2017, 7:58 am

Need a good starting point. Msd 6al box, duraspark distributor, 830holley vac carb, performer air gap intake, hydraulic roller camshaft ,headers, 4.3 crankshaft, 5 spd transmission, 4.10 rear gear, weekend street use only in a 67 ford f250 2wd truck. Won't be towing anything as it's a frame off resto mod.

Thanks
Travis

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Re: Spark plug help 9.5:1 532 d3 iron heads,

Post  rmcomprandy on July 4th 2017, 5:32 pm

For the street engines I build with those heads I use an Autolite AP24 but, the regular 24 should work.

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Re: Spark plug help 9.5:1 532 d3 iron heads,

Post  TravisRice on July 4th 2017, 6:09 pm

Thanks Randy. I've never had an iron head pump gas motor and wondered about what plug and range with an msd ignition. Much appreciated.

Travis

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