Does anybody know the Combustion Chamber size on a 1967 318 LA engine? I'm looking to replace the cam and cylinder heads on my 1967 Sport Fury and I can't find the Combustion Chamber size in the Service Manual nor online.
As you are installing a cam, I presume you are looking for some more power?Does anybody know the Combustion Chamber size on a 1967 318 LA engine? I'm looking to replace the cam and cylinder heads on my 1967 Sport Fury and I can't find the Combustion Chamber size in the Service Manual nor online.
Thank you for your reply. I am having a difficult time locating heads that are compatible with the 318 LA engine. I was on the phone yesterday with Summit Racing asking about cylinder heads. They responded that the only heads they have for my engine are the Edlebrock Victor Series Racing heads (EDL-61729) which is not what I’m looking for. You mentioned heads from the TBI era. Sorry for my ignorance but, what is the TBI era and where could I source these heads? Thank you.As you are installing a cam, I presume you are looking for some more power?
The head from the TBI-era 318s would be ideal. The are closed-chambered with small valves and swirl technology. I would guess they'd add 15hp to 60s 318, esp with a mild cam change. -902 casting #?
Then the 360 head from the TBI era is similar but larger valves (and maybe open-chamber?) and would give more flow.
Both those heads are LA pre-cursors to the Magnum head.
Those heads are reportedly prone to cracking between the valve seats (the Magnums are more famous for it) but it doesn't seem to harm performance/driveability. Nobody knows their heads are cracked until they remove them.
Magnum heads woudl be an even better upgrade -- but there are more parts that must be changed to use them.