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Henry,
Unless you have one of my “tight lash” Poly cams, you must run solid
lifters with your solid lifter cam core. Lobe design and transition ramps
are different for a Hyd. Poly Cam and best to stay with what you have to save
money.
Yes, the “Cool” Poly will look and run better than the LA 318.
Let me know if I can help you further or email me at glpavlovich@xxxxxxx with any detailed
information not pertinent to the overall Mail List discussion interest.
Gary P.
From: Henry Jacobs
Sent: Sunday, October 08, 2017 11:17 PM
Subject: Re: 318 Poly Valve Train Question Gary,
Thanks for the response! This is great information. The engine
I have is a 66 block and contains solid lifters. Some folks have suggested
that I replace the lifters with hydraulics from a later LA design. I'm all
for less maintenance, but my concern is that the existing cam is designed for
solid lifters, and that one for hydraulics would be different.
This project is designed to be a "quick" cleanup (as if that ever happens)
of a "recently rebuilt" Poly allegedly with about 20k miles on it that was
pulled and stored for 10 years or so. The engine had a bent exhaust push
rod on the No 8 cylinder, which is likely why they pulled the motor. The
cause appeared to be a water leak via the intake manifold causing
hydraulic valve lockup. The rest of the motor looks consistent with the
story as told, as does the fact that it came with new heads.
Further complicating the story, and crushing collector value, is that the
W500 obviously orginally came with the 251 flathead engine thread offered in
that year only. Some prior owner was apparently a skilled stick welder,
and fabricated and welded to the frame engine mounts for the later 318
LA. This ran fine, but had a minor fire on my watch, and I happened into
the Poly, which is "correct" for the truck and looks cool. Sic transit
Gloria....
Thanks again!
H On Oct 8, 2017 8:33 PM, <glpavlovich@xxxxxxx> wrote:
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