Re: [Amc-list] 71 Gremlin 232

[adh@xxxxxxxxxxxxxxxxx (Sandwich Maker)]

" From: Frank Swygert <farna@xxxxxxx>
" 
" 
" Tom, the only "problem" you might have is that the ports on the 70
" head should be much bigger than the later model ports. I know the
" early 60s 199/232 has very large ports, not sure exactly when they
" started getting smaller. Since the ports on the block are larger than
" the ones on the intake it won't really be a problem at all. Once you
" see the ports you might want to round the edges on the intake to
" reduce turbulence, that's about it. Should work just fine. 

'72, with the advent of the bridged rocker setup; they shrank the
ports by raising the floors and supposedly -gained- flow...  and also
supposedly the water jacket cores weren't changed, so there's a lot of
metal under those ports.  afaik this shape was carried until the 4.0.

they continued making shaft rocker heads until '74 but i can't find
out if they made the port shape switch in '72 also.

all 199/232/258 heads had 56cc closed chambers '64-7, 66cc open
'68-'76, 74cc open '77-'80.  they shrank again during the '80s but i
don't have data.  pistons changed at the same times, except for a
single 258-only slug used '80-'90.
________________________________________________________________________
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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