Correct spark plugs for a Super Eta w/ "I" intake swap?

[Yogawrench]

I recently did the "I" intake swap on my 1988 Super ETA. Also installed a used Bav Auto chip which requires 91 octane fuel. What type of spark plugs should I use, and what is a recommended gap spec to be used. There seems to be a longer cranking time (2-3 seconds). Maybe this is related to the spark plugs in the car (Bosch WR9LS)?


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[SmokeE30]

NGK ZGR5A or BPR5ES .7-.8 mm i think is gap called for on m20s not sure what it is on them but i really never bother to change em just make sure they are all the same before they go in

[JinormusJ]

+1 on the NGK ZGR5As
Upgraded to them from the Bosch and I'm more confident running the NGKs than the Bosch

[JGee]

+2 on the NGKs