ok, well stockj replacement plugs and .048" apparently dont work too well on a 10.3:1 iron head SBC. i just got some crappy AC delco r45T's and they're not working.. what plugs should i use.. i;m like AHH!!! cause 1 and 8 aren;'t frigin, and i think the plugs are the problem!! PLease someone please help me!!

 

I would move this to the proper tech forum but you have no sig, vehicle info, engine type, etc listed. Please list these items in the future so people can know what your refering too.

Please repost this under the proper gen tech forum.

Thank you.