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80 & 81 heads

Moderators: Curt!, Pa

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X-WLCH

Posts: 111

Joined: Wed Apr 30, 2008 12:16 pm

Post Sat Sep 21, 2013 11:24 am

80 & 81 heads

Did HD leave the lower valve spring collars out of these heads? I have a set that are 1.375 from the head without collar to the upper collar. Or did they run a special low lower collar with less spring space ?
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amklyde

Posts: 617

Joined: Fri Dec 19, 2003 1:01 am

Location: Wisconsin, USA

Post Mon Sep 23, 2013 8:58 am

Re: 80 & 81 heads

They have lowers that sit directly on the head, no support from the guide. 80-81 motors always required spring spacing work when you installed any higher lift cam. Spring space with upper only at .375 seems extra tight, aftermarket valve a little short or thick at face?

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