Re: [Amc-list] performance six

[adh@xxxxxxxxxxxxxxxxx (Sandwich Maker)]

" From: Tom Jennings <tomj@xxxxxxx>
" 
" Since I just hot-tanked and cleaned up an original '64 232 (or 199, who 
" knows) head, I pulled out the two Navarro heads and lined all three of 
" 'em up on the bench.
" 
" The two Navarro heads are different.
" 
" One is a 3170717, identical in every way including numbers to my 64 
" stock head. It's had some work done; combustion chamber polished, and 
" []
" but one oddity -- the exhaust valve guide holes are about .43" diameter 
" instead of the .3something of stock. QUITE large.

0.375" +/-.  your heads were probably set up for sodium-cooled exhaust
valves, though i don't know why the stems had to be quite so large.

" Sadly, the pistons I have don't match the bores. I'd never actually 
" checked before! The block bore is 3.690" and the pistons (below top ring 
" parallel to pin) 3.723". With Starrett dial caliper, I could be off a 
" few thou. Pins are full floating, .928" diameter. Compression height is 
" 2.084". This was a 199, but I have no rods, don't know stock rod length 
" or compression height stock, so these pistons could be from any motor at 
" all, maybe not even AMC. ANyone have piston data?

stock pin height on all 199-up sixes is 1.6" +/- a bit, except the
'80-'90 258s which are 1.65".  stock rod length on 199s, '71-9 232s,
and 4.0s is 6.125"; on '64-'70 232s and all 258s it's 5.875".  all
199s and 232s, and '80s 258s, run zero deck height.  pin size is
0.931".  going from memory, isn't 0.928" a chevy size?

" From: Wrambler242@xxxxxxxxxxx
" 
" AFAIK, they never put the 199 out for production use in 1964 so that
" 64 head you had cleaned should be for the 232.

yeah, but that head was used '64-7 so unless he -knows- it was built
in '64...
________________________________________________________________________
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen
adh@xxxxxxxxxxxxxxxxx                       and think what none thought
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