chevy 350

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chevy 350

Postby h-bot » Sun Oct 15, 2000 8:36 pm

From: manfromtoledo_REMOVE_481487_THIS_@yahoo.com


i have a chevy 350 block. i want to put a 400 crank in it. what all do i need . can some oe help me. thanks
ed


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chevy 350

Postby h-bot » Sun Oct 15, 2000 11:17 pm

From: scotthansen_77_REMOVE_359902_THIS_@yahoo.com


You will have to do a couple of things. First you
will have to get the 400 crankshaft mains turned down
to fit into the 350 block. The last shop I talked to
about this said they charged $125 to turn the mains on
400 crank down so it would fit into a 350 block. The
next thing you will have to get some 400 connecting
rods. A lot of people suggest using 350 rods because
they are longer which helps correct the rod side angle
but they are not long enough to make a difference and
the 350 connecting rod bolts have to be clearanced so
they will clear the inside of the 350 block and the
camshaft. Midwest Motor Sports sells 350 connecting rods
that have been clearanced to run on a 400 crank in a
350 block with aftermarket rod bolts for $114 a set.
They also sell 400 connecting rods with after market
rod bolts for the same price. I used a little good
old fashion trigonometry on this debate and the use
of 350 connecting rods corrects the side angle by a
mear 1/2 of a degree. With the use of 400 connecting
rods the angle was something like 17.8 degrees and
with the use of 350 rods the angle was something like
17.3 degrees. Also, pistons that have a raised wrist
pin for use with the 350 rods will be more expensive.
You will also need to obtain a 400 harmonic balancer
and flexplate. You will also need to use a drimel
tool and clearance the block for the connecting rods
at the bottom of each clyinder.

Hope this
helps.

Scott Hansen


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chevy 350

Postby h-bot » Mon Oct 16, 2000 1:50 am

From: denisst78_REMOVE_499325_THIS_@yahoo.com


shop around,
i saw an ad in a hot rod
magazine
i think it was speed o motive.
they sell a
complete kit
crank rod pistons ringns and
bearing

If you usea stock (cast) 400 crank
you`ll have
to turn hte main down to fit
the 350 block,
i
prefer to use the longuer 350 rod and
buy new
pistons ( very cheap for a long
rod 383 lots of
companies make them)

if you use the short 400 rod
you can use
pistons for a 350

area to
check
if using long rod you go to grind one side
of
the rod to clear the camshaft

in both ways
you got to grind the block
(added storke) and
check for oil pan
clearance (usually in the rear
area
rods migh hit in it)

Denis


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