We bored out my extra TBI today with an offset cutting head. I will say that there isn't much to mill out. The little holes that let the Eval Canister purge into the manifold become caves when you cut into the sides. The little hole get cut away and the passage behind it protrudes. So now, I had this big chunk missing out of the bore right where the throttle plate would rest. So we got on the lathe and cut some pegs to the exact size of the holes and pushed them in. They had to be a tight fit so I took my 40lb CO2 tank and blasted the pegs with liquid CO2 so they would shrink and then crammed them in. It turned out alright. I still have to get throttle plates out of the TPI 'body. Pictures soon to come...

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'92 Astro, GM crate 350, Holley Pro-Jection Intake, MSD 6AL, 3.42's, 2.5" exhaust, Flowmaster 40 2 chamber, B&M 2nd stage shift kit, 255 60 R15 tires on AR-727's, Polished & Bored TBI, Custom EPROM in progress

 

you should paint that van like the A team van

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-Tas
'89 Formula WS-6

305, TBI, 700R4, P.A.W. 14x3 open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips, Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248)
Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options

 

You have no idea how many times I've heard that

 

Wich crate motor?

 

Stock L05, new from the dealer.