Spark plugs

[V-8]

Hi guys;
I sent an e-mail to NGK spark plugs for my engine combo>>>>>>>>>>>>
>**** Contact Form & Tech Info Feedback ****
>
>Email From: atayaydiner@hotmail.com
>VehicleType: car
>Make: ford
>Model: mustang
>Year: 1967
>Engine Type: 8 cyl nitrogen
>Comments: Hi Sirs;
> I am looking for spark plugs which can i run with it.The cly heads prefers #NGK-fr5 but i can't find that part number.The part number changed?
> Engine spects:
> 1)Trick flow twisted wedge heads full ported and polished.
> 2)12.8:1 comp ratio
>
>
> 3)408w stroker
> 4)750hp series carb holley
> 5)edelbrock victor jr intake
> 6)comp cams 608-614 lift, 240-246 0.050,110 lsa mech roller
> 7)msd 6al ,50000 volt msd coil blue,pro billet msd dist. ,8.8 accel wires black
> 8)all forged bottom end
>Not lease send me the new part number about NGK fr5 and can you prefer me a spark plugs and part number like iridiumx which can i run with
> And i will use nitrogen 175 hp fogger with alcohol.I must change the spark plugs with which part number?Thanks..
>When: 5/2/2005 10:02:03 AM
>
>END OF REPORT
>From: "Info"
>To:
>Subject: RE: NGK Form Mail
>Date: Mon, 2 May 2005 12:49:25 -0700
>
>Hello,
>
>I can provide you with the FR5 stock number 7373. This spark plug is very hot and you may experience pre-ignition and damage your engine. Ideally with the compression and nitrous your running you should be using a BKR7EIX stock number 2667.
>
>Jon MacQuarrie
>Technical Support Specialist
>jmacquarrie@ngksparkplugs.com
>(248) 668-8873