Hey guys - another question or two. I want to get some new retainers and locks for the 1.55 edelbrock single springs. I have stock valves in the heads. When I look for locks for stock valves, I find 4 groove for the exhaust valves (which is what I have), but 2 groove for the intakes. But my intake valves are single groove, I have two sets of 906 heads and both of them have intake valves like this. I guess I'm more concerned about getting the right intake locks since I am only seeing 2 groove retainers when I search for them (at least for the stock retainers).





Valve off other 906 head:




Should I get one of these these retainers?:

Comp Cams 780-16
or
Edelbrock 9644


And for locks?:

Comp Cams 604-16 (4 groove for exhaust)

Comp Cams 603-16 (1 groove for intake)



Sorry, I have never replaced retainers/locks before and want to make sure I get it right.

Thanks