Spark Plugs for 1940 Sport Scout

[kunzog]

What is the best plug for a 1940 Sport Scout, specifically a 1940B 45 ci. Indian specifies Champion J-6 but they are no longer available. I know that Starklite sells a repro Indian but they are longer reach and the porcelain tops are longer than I want. Is there a plug with a shorter porcelain that does not come so close to the bottom of the tank? I had some really short plugs but they required a small diameter plug wrench and mine was too long to access the plugs.
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[duffeycycles]

Bosch W5BC or W7BC or cross reference to others..I think NGK[BP7HS]or B7HS..Bosch W5BC crosses to Ironhead sporty w/points

[duffeycycles]

Autolite # 4093 is another

[kunzog]

thanks, I appreciate the input