Quote:
Originally Posted by Ed McLawhorn Jr.
Jody, it's a set of heads I bought used prep by layer. The spring currently on heads are the manley nextek 221447 spring. spec (350# at 2.0 installed ht.)
Ed
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And you're only getting 35-40 runs out of the Nexteks?
I was told by a reputable Class engine builder that some have had problems with the doubles.