Team Chevelle banner
Status
Not open for further replies.
1 - 2 of 2 Posts

·
Registered
Joined
·
102 Posts
Discussion Starter · #1 ·
HI. I have a 454 in my 67,750 Holly vac secondary,HEI, ETC. What are the best plugs to use, What should the gap be. Right now i have Bosch Platinum in but there are no rings around these to seat on. There is oil on the threads, but the ends are dry and a brown to black in color.Also if these plugs had these rings would this stop the dark blacking around the hole.Thanks
 

·
Registered
Joined
·
111 Posts
300, the early style heads use the plugs with a washer and the later ones have the taper seat, no washer . I'm not sure what the cut-off year was. If you post your heads casting number in tag team you'll get an answer. You might be able to look in the plug hole and tell by a visuall inspection..
 
1 - 2 of 2 Posts
Status
Not open for further replies.
Top