I just bought a set for my 340. Do you use the same plugs as the cast iron heads or not?
Edelbrock RPM 340 Heads
- Thread starter 340Dart
- Start date
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halfaed
Well-Known Member
They are supposed to be factory replacement, But I don't know if you do. Someone will be along pretty soon to let you know!
dustertogo
Well-Known Member
Are you asking about the size of the plugs, or heat range?
Heat range. Would you still use like RN9YC?
dustertogo
Well-Known Member
If you've been running the N9Y it should work fine. Are you making any other changes to ignition or carburetion?
No other changes except the heads. Thanks for the replies.
Your answer is in the Edel. instruction sheet(s).
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