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I'm sure that my 390 is still a virgin and is still 100% stock, that being said I checked for that darn valve noise that been driving me crazy and i found #8 exhaust pushrod was very very loose and had +.100 gap between the valve and rocker arm.

What would be the next size up in pushrods and where could I buy one at?

Thanks in advanced.

Mango
 

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.060 longer than stock. You need to look at why it's loose.
 

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Also need to check the cam lobe to be sure it isn't going flat.
 

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I assume this is a hydraulic cam engine? If so,it may be that that lifter needs to be replaced?
Very unusual to need different push rods unless you have had extensive work done to the heads or the block mating surface. And even then you would need all 16 of them.

Scott...
 

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Also check rocker arm asm oil supply and rocker/rocker shaft wear.

C3SZ 6565-A STD- 9.797" L

C3SZ 6565-B .060 U/S 9.71" L

C3SZ 6565-C .060 O/S 9.83" L

Push rods should still be readily available from vendors such as Perfect Circle/TRW.
 
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