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Username Post: Holley TBI on Older 327 V8        (Topic#353998)
Posts: 15

Loc: Colorado
Reg: 04-11-18
11-20-18 11:07 PM - Post#2751976    

I have this idea of putting a Holley GM TBI setup that i snagged of craigslist on an older 327 block. Aftermarket heads cam intake etc etc. Adapter plate for 4 barrel to GM TBI. Can anyone see a problem in his or is it essentially easy to do if you have a good understanding of tuning TBI? I'll update as the project goes on. I'm haggling the block next so if i'm making a mistake with the 327 block and crank....tell me.

Edited by Doomsayer88 on 11-20-18 11:08 PM. Reason for edit: No reason given.


Very Senior Member
Posts: 4559

Reg: 12-29-02
11-21-18 12:41 PM - Post#2752022    
    In response to Doomsayer88

It should work, but how hard it is depends on what you have. I have no idea what you mean by Holley GM TBI. Exactly what parts are Holley and what parts are original GM?

"17th Year" Gold Supporting Member
Posts: 2018
Loc: Dallas, TX
Reg: 05-17-04
11-22-18 08:31 PM - Post#2752155    
    In response to Doomsayer88

I started out with a Holley HP Throttle Body EFI and later converted it to a Multi port sequential EFI. Both worked great.

'57 210, 327 cid, Holley MPFI, 700R4, A/C & more.
'51 Studebaker Starlite coupe, 350, TH400, GV OD.
'96 Replica of a 1950's Teardrop Trailer.

Silver Supporting Member
Posts: 404
Loc: West Richland, WA
Reg: 02-05-17
12-23-18 10:29 PM - Post#2755437    
    In response to 5Larry7

My brother has a TBI system running on a 327 in his '63 Chevy pickup, and it runs like a top. The engine has an RV cam and World Products 2.02 heads. Intake manifold is a stock 70's quadrajet manifold with the adapter plate from a Holley Pro-Jection setup. 15 years ago, we put a Holley Pro-Jection on it, but never got it to run quite right, even with the closed loop system. The stock TBI computer runs it much better. We also converted to serpentine setup, and everything runs well. I did go through the work and re-tuned the engine to fine tune everything. The engine ran well without changing the tune after a few hours of driving around town, so it's not absolutely necessary to burn a new PROM chip, but it helps. There are people online who will burn new chips for you, and the price is reasonable.


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