Use a phenolic (fiberglass type thing) spacer under TB to raise it increasing manifold volume and insulate it from manifold heat.
Run two or three injector tower gaskets to raise injectors up and out of the TB bores and insulating them from heat transferred from manifold.
Two gaskets require no mods to TB, three require grinding of the lil bar that wraps around the back of the TB base.
Because Fuel lines will hit it.
You need longer bolts to do this. Any auto shop or hardware store will have them.
Your TB will actually get cold from the air flow instead of hot from engine heat.
If you want more flow than what that gives, take TB base to any machine shop with a end mill and have the "lips, aka horns" milled off the TB that wrap around the bores.
You can also get a TB from a big block and do the same mods above and get the big TB bores. Next to expensive after market TB's the modded big block TB is best.
Be smart, get the correct wrenches to work with those lines and fittings or risk rounding them and stripping the injector towers threads out.
Been there done that.
Best way to deal with those crappy hard lines is to cut them back aprox 8" and use nice flexible ruber reinforced fuel line.
This way when you want to pull the TB, you simple loosen the hose clamps that hold the rubber lines to the 1.5" hard line stubs that you left on the TB and slide off the hose.
They are diff sizes so you can get them mixed up.
Makes it very easy and fast to remove and clean the TB and no more using those ****** wrenches on those butter soft fittings or risking stripping the towers threads.
Tower spacer. I used 3 gaskets instead of spending that kinda $$.
Phenolic spacer for under the TB
This is advice learned the hard way and over many years of playing with Early GM engines.
