340 X Head Valve Options
Just an update... almost 5 years later... I still have the 6.1L Hemi valves and X heads sitting in the trunk of my Dart in a barn this whole time. Hope to get back on this project this year and I'm starting with the heads.
I am taking the heads and valves to machine shop in Groveport to evaluate if this is possible. Issues I see with the setup is getting the required 6.1L valve spring install height of 1.80" and valve guides for the narrower stem. The internet seems to indicate that stock X head valve spring install height is 1.65". I assembled a 6.1L Hemi valve and a stock X Head Intake valve next to each other. The 6.1L valve is overall slightly shorter but the locking grooves are higher on the stem.
To fit the valves will require a valve job and will "sink" the valves some, this should give me some of my spring install height. However, I will still have to machine the spring cup seat to achieve my 1.80" install height. Any idea how much meat is under the stock X Head Valve Spring Cup/Seat???
If I can take 0.100" out of the cup I think this whole wonkey idea might work.
Once I get the machine shop on board I am going to get started with the home porting work.
Thanks FABO
Just an update... almost 5 years later... I still have the 6.1L Hemi valves and X heads sitting in the trunk of my Dart in a barn this whole time. Hope to get back on this project this year and I'm starting with the heads.
I am taking the heads and valves to machine shop in Groveport to evaluate if this is possible. Issues I see with the setup is getting the required 6.1L valve spring install height of 1.80" and valve guides for the narrower stem. The internet seems to indicate that stock X head valve spring install height is 1.65". I assembled a 6.1L Hemi valve and a stock X Head Intake valve next to each other. The 6.1L valve is overall slightly shorter but the locking grooves are higher on the stem.
To fit the valves will require a valve job and will "sink" the valves some, this should give me some of my spring install height. However, I will still have to machine the spring cup seat to achieve my 1.80" install height. Any idea how much meat is under the stock X Head Valve Spring Cup/Seat???
If I can take 0.100" out of the cup I think this whole wonkey idea might work.
Once I get the machine shop on board I am going to get started with the home porting work.
Thanks FABO