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Old 07-11-2012, 12:12 AM
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help with the right spark plug to run..

Built a mild street /strip weekend type car(nova)..
Motor is a mild built 350 with some mid 90's Alum heads(angle plug)..
I guess I'm curious on your guys input and what u guys would run.

"at work and bored its 1am , can't stop thinking about fireing the car up"LOL

Thanks for all your input..

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Old 07-27-2012, 08:19 PM
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If youre asking about brands, I've only ever used ac delco, ngk, and autolite and never had any problems
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Old 07-27-2012, 08:33 PM
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I would put in an R45T AC delco. From there , read the plugs after you make a pass with it. Adjust the heat range accordingly.
An R46T is one step hotter
An R44T is one step colder
The "T" in the plug designation denotes a taper seat, meaning the area that the plug makes its seal is the taper edge at the top of the threads (next to the plug body). Look at the heads to be sure they are made for taper seats. They very well could be a washer seal type of plug. In which case you would drop the "T" suffix from the plug number - R45 for instance. LA
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Old 07-27-2012, 10:53 PM
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Are these OEM heads the gen II LT-1 LT-4 type or the Gen I "L-98" TPI head? Same as used on the ZZ4 350 crate motor. 113 castings.
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