As I've related previously I plan on using a 99 Vortec 350
engine that originally came with an automatic transmission
and in place of the automatic I plan to run a manual transmission.
Is there an issue mechanically with doing this? What about
the balance of the engine. I've looked at various parts sources
and none have any referenced about the harmonic balancer
being for a automatic or manual trans equipped engine.
My assumption is that I could buy a clutch kit and other related
parts for a 99 C/K truck and I would be ok.
Any thoughts on this?
The only real issue here depends on the tranny and if a pilot bearing
is needed in rear of crank to support it. (this is not a big problem)
Bolt patterns are the same and the 350 is intenally balanced. The only
SB's like the old 400 SB that used a specail damper and flywheel or
flex plate and it is possible that the crate 383 does too. This is
one reason chevies are so popular for builder because the bolt pattern
on the small block has not changed for 40 years and shared it with the
big block too. GM did change things with the new 4.8, 5.3 and 6.0
while the 8.1 and 4.3 kept the orignal pattern.
appreciate the reply. I talked to one of the
"old timers" at the local GM shop. He said no problem. So
now its just a matter of more $$.
I think the wiring will be the biggest challenge on my project. I plan
to use a painless harness, and have the PCM
reprogrammed to do away with VATs and some other things.
Not sure how I'm going to deal with EGR, since I'll have to run the
old school type "rams horn" exhaust manifolds. I guess I could
potentially drill and tap the appropriate manifold to approximate
something like the stock manifold (and use the fitting off the current
exhaust manifold, if its removable) or I know I can turn off
EGR through PCM programming. Not an issue where I live.
Oh the old Ram Horns, i remember them well and used them a lot way
back when. They flowed nicely for a stock manifold. They came in two
sizes too. 2 inch dumps and 2.5 inch dumps (the bigger ones were
usually on vettes and hi preformance 327's and such) 1973 was the last
year they were used in trucks. I am puzzled by you wanting to drill
exhaust manifold when you should be able to find a intake that has a
ERG port on it and drawws exhuast via the crossover in ontake between
heads umless you block itoff which is not a good idea for a street
vehicla as it will be VERY cold natured at times be it carb or TBI.
the engine I have is a complete assembly ...1999 350 Vortec, with
stock manifolds, complete intake, with all accessories, OEM stock
just like in a 99 pickup, Yukon...etc. It has a egr pipe that goes
one of the exhaust manifolds. If you are forced into changing the
stock manifolds for the old style above due to clearance issues, you
have just lost your EGR hose connection. I plan to run the fuel
injection and keep the engine stock...except for the mentioned exhaust
manifold swap. I have everything for the engine except the air filter
Sounds like it. One more thing you what to make sure that there is no
clearance issues with the ram horns with where they dump at. When GM
switched over in 73 to the "log" style manifolds they had to notch out
the upper frame rail for clearance and effectively weaking it and it
stayed that way 73 thru 87.
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