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Discussion Starter · #1 · (Edited)
UPDATE: THESE HAVE BEEN SOLD THANK YOU FOR ALL THE REPLIES

I have a question about stock Valve cover applications
So I am selling these 454 Valve covers and need to know if you have mill down the tabs in the pics to use on Gen IV heads ?? Some say yes other say No just use the right Oring gasket and wont have an Issue I need to know 100% if you have to mill tabs off to use on the 781 heads or any other Mark IV and lower head


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How’s it going!!! I figured it had to be somebody from the g3 forum. The covers looked familiar but the 74 user name threw me off. Sneaky!!
 

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I cut those tabs off on my valve covers like that and they sealed to the heads very well with 0 leaks.
 

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1970 El Camino SS396, VortecPro 467, ATI TH400, Moser 12 bolt /TruTrac 3:42, Hedman headers
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The tabs are to prevent you from over compressing (crushing) the valve cover gasket these covers use.
 

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if you look at the sealing surface on the older heads like 781 and 049 it is not as wide as the gen 6 heads. when i tried to use the oring it leaked. i milled the tabs down and used a regular gasket and worked fine after that
 

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can you just use a angle grinder to cut the tab down? jim
 
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