ok i just put in new jdm b18c5 piston in my gsr motor and i need to know what sparkplug will work for my set up becuse. It wont start with the stock one that are ngk bkr6e-11

 

ngk BCPR-7ES

 

The problem isnt the spark plug

 

well i think it is because the sparkplugs i got in it rigth now look like there all most hitting the piston. so these are shorter one ngk BCPR-7ES for my high comp motor

 

so the ngk BCPR-7ES are shorter?

 

iv try and finey got the car to start but it dont run go i cant get the timming right and i lined up the white line on the crank and the cam lined up and still i cant get it running right

help me