I'm replacing my heads with an Edelbrock set, but I'm keeping my rocker assembly. (for now)
Per the Edelbrock instructions; "The intake valve has been moved away from the bore centerline compared to a 390/428 head. The intake rocker arm may need to be shimmed over .060". A valve spring shim of the proper diameter may be used."
I checked it with my feeler gauge and sure enough, it was off by right at .060". I bought the shims and tried taking the rockers apart. According to my T-bird shop manual the rocker parts should all just slide off once the cotter pin is removed. However the towers are pretty darn tight. Is it OK just to twist and turn them off or is there a better way? I hate to score up the rocker shaft.
thx, Dave J
Per the Edelbrock instructions; "The intake valve has been moved away from the bore centerline compared to a 390/428 head. The intake rocker arm may need to be shimmed over .060". A valve spring shim of the proper diameter may be used."
I checked it with my feeler gauge and sure enough, it was off by right at .060". I bought the shims and tried taking the rockers apart. According to my T-bird shop manual the rocker parts should all just slide off once the cotter pin is removed. However the towers are pretty darn tight. Is it OK just to twist and turn them off or is there a better way? I hate to score up the rocker shaft.
thx, Dave J
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