I have bought a set of Flowtech shorty headers (owned by Holley http://www.flowtech.com/headers.html)
and found that they fit the best compared to a 82-92 f-body
set. Only problem (if it is one) is that you have to run dual exhaust as the angle of the outlet on the
drivers side is on a 45 degree slant towards the back of the car. They do not interfere with the
shifter linkage or oil filter. Starter has good clearance as well.
On the good side:
These come with or without the air tubes (if yes they are on both sides) and in either black paint or
On the bad side;
If you get the AIR tubes you cannot have ceramic coated. (getting mine done locally) Also they do
NOT have the O2 fitting. You will have to have a fitting welded in if you want one. (cost me $20.00
Other than that there great. I have found that the 86-88 f-body had tubes in both manifolds. The
AIR pump is in the same place as the Caprice 305 and uses a plastic TEE (p/n 10046154) to split
the air flow out put. Then GM designed a steel AIR pipe to route air from the passenger side,
around the back of the engine, to the drivers side. (try to install it with the engine in the car and find
new levels of frustration; but can be done) After that just connect them with pieces of hose. I found
a couple of pre bent ones for the same year f-body that may work. (no part numbers, sorry)
How's it run???? Still don't know. I got as far as test fitting all you have read and now trying to save
up the $$$ to have the coating done and the new dual exhaust run.
As far as the Transmission crossmember, I have a new one for an Impala SS. MAN, is that some
piece!!! Compared to my stock one it looks like it could hold up the Space Shuttle!! It weighs
about twice as much too! (just another reason to get the 383 stroker) Just by holding it up the
underside of the car, it LOOKS like it will bolt up the frame but I have my concerns about the
transmission mount. I'm not sure if the trans pan will hit the crossmember or not. I haven't dropped
my old one yet. I figure there is no need as the cat bolts the trans mount and the new crossmember
will be in the way. I'll wait until I have everything ready before I attack that one.
As far as the turning problem, I'm not sure. In my wagon, if the gas is low it will try to die since the gas sloshes to one side of the tank. This may not be your problem but check your fuel level next time anyways.
91 Impalatized wagon
Dark Met. Gray 9C1 gauges, 305, currently headerless and broke!