87 stock heads

[ratrod gn]

live in the boston area . 250.00

 

[we4Mateo]

Have they been sonic checked or magnafluxed?

 

[ratrod gn]

Have they been sonic checked or magnafluxed?

no they were w honly on car for a few hundred miles then i had to upgrade

 

[we4Mateo]

Stock heads have been in the 9's. Why did you have to upgrade? And what were they before they only had a few hundred miles on them?

 

[ratrod gn]

Stock heads have been in the 9's. Why did you have to upgrade? And what were they before they only had a few hundred miles on them?

was not working with the new turbo. they were rebuilt when i did the motor over.

 

[we4Mateo]

was not working with the new turbo. they were rebuilt when i did the motor over.

Were they magnafluxed then or sonic checked? What turbo are you trying to run? What size valves? Any porting? Pics would be helpful at this point.