What is the best pushrod guide plates?

[Howard Hull]

What pushrod guide plates did you use?
What about show cars, one piece unit 5919?
How thick are they?
Does the rocker arm stud threads have to be longer, than .750?
Are BBC plates different than 409?

Thanks Howard

 

[Murphdog]

What pushrod guide plates did you use? I have some from Carl McQuillen.
What about show cars, one piece unit 5919? Don't know. McQuillen's are 2 piece. Takes 2 per head.
How thick are they? 3/16
Does the rocker arm stud threads have to be longer, than .750? .750 - 3/16 = 9/16 engagement into the head. Should be a minimum of .65/.70
Are BBC plates different than 409? Yes

Thanks Howard

 

[Ishiftem]

Do you need guide plates? If the pushrod holes in your head are in good shape, you likely don’t need them. I run a solid roller cam to 6800 rpm and over 600 pounds of open spring pressure and don’t use any.

 

[Don Jacks]

If your existing push rod holes are in good shape,all you'll need is a good 5/16 push rod with a thicker wall thickness like .110-..140.

 

[Howard Hull]

If I use the Carl McQuillen plates, do I just mill the 4 exhaust stud bosses? or all 8 and put washes under the 4 intakes?
So looks like I have made a mistake, I have the bosses milled flat. to put screw in studs. Not 8* on intakes and 12* on exhaust. which way
do they angle?
I could have the corrected by milling 3/16th more off, to use guide plates.

thanks Howard

 

[Murphdog]

With the McQuillen plates you will cut the intake bosses 3/16 to allow for the guide plate & some additional amount for most or all of the hex on the stud. Whatever this 2nd figure is should also be cut off of the exhaust bosses but not the 3/16 for the plates. BOTH need to be cut at their original angles. You might check with Carl but this is what I would do.
Jeff

 

[Howard Hull]

Is the 8* and 12* the angle of the stud, or the angle of the stud boss? or are both angled?

Howard