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Old 01-05-2013, 08:36 AM's Avatar is online now
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Here is basic for big valve 049-781 heads.

Clean, check for cracks/warp.
Check valve guides for wear. If worn, repair with bronze liners.
Shorten guides and cut for performance seals.
Serdi cut intake seats for 2.19 valves.
Bowl hog to blend.
Serdi cut exhaust seats for 1.88 valve.
Bowl hog to blend.
two angles on valves
Install rotator eliminators.
Install valve seals.
10 degree +.100 retainers
Set springs to spec height.

I just did six of these heads for inventory last week.

For economy sake. Comp Products has a good price for aftermkt seals and a special on valves on the broom sheet.
Good prices on springs.

I bought hundreds of stock length stainless 2.19 and 1.88 valves. On a deal, several years ago. If you can buy +.100 valves reasonable, use them rather than the +.100 retainers. These heads, stock, have short valve springs.

If a mild cam with single springs. You can save money by not cutting guides and use 455 Buick valve seals. Also TSC stores sell a gold colored 5/8" washer in bulk hardware. That, when used in pairs, work good as rotator eliminator.

Heep guide to valve stem reasonably tight. Loose guides along with large valve heads= dropped valves. A historic BBC problem.

Last edited by; 01-05-2013 at 08:42 AM.
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