My dad just told me he has got a 750 holley in the basement. It needs a rebuild, but I'd like to put it on my LG4 if possible. I'm unsure of what model is is, but I will find out soon.
The car is a 1982 Trans Am modified by Mecham.

The car will have a 1 5/8 inch headers with a 3 inch catback. I haven't decided to use a cat or not.

The torque converter is stock(1800 I believe not sure though) with a three speed 200C tranny, and 3.73 gears.

Everything else on the car is stock. Cam, compression ratio, and I haven't messed with the timing or anything else with the motor.

Is it possible to buy different venturi sleeves to reduce the flow rating? And what else could I do to make it more suitable for an LG4? The first thing that popped into my mind was 1:6 roller rockers.

I'm also unsure of what Intake Manifold to use.

 

The Holley will drive you to other changes, not all of them desireable or cheap (distributor, intake manifold or adapter, torque converter lock-up), and will not in any way improve the power the engine puts out (assuming your stock system is working as it should).

You need to fix the exhaust (sounds like you're doing that) and upgrade the cam. The air cleaner, if still single-snorkel, is also a power-killer. Fix those three things, and thoughts of the Holley will soon fade away. It could be argued at that point, the heads could use improvement, and it's possible the stock ignition coil and module would hold you back. The compression ratio is also lower than necessary or desireable for power. But you still don't need a carb upgrade.

Unless the primary use of this car is racing, you really don't need a different carb. If your primary use of this car is street driving, you really want to keep the stock carb.

 

Darn. I've got an open element on it right now for the intake side. I plan to upgrade the ignition system, but haven't looked into it. I liked the holley because of its simplicity and it wouldn't be controlled by the computer. Why do you say the thoughts of a holley fade away? But in your last words, the holley sounds like its just for racing.

 

Upgrade those other things (as you can see from my sig that I've done - except mine came with the higher compression ratio), and the thing will definately get with the program. The computer controls give you the best mix of economy, throttle response, and power that you can get. It automatically adjusts the primary mixture, and adjusting the secondaries is a matter of turning a screw and changing rods and/or hanger (which requires removing one little screw to accomplish, all without taking the carb apart). What could be simplier than that?

I wouldn't say the Holley is just for racing - thousands and thousands of people run them on the street. What I am saying is it isn't a good choice when you've already got the best street carb you can get.

By the way, that Holley doesn't have replaceable venturi sleeves so you can taylor the flow to your engine. I've never seen that type of carb as being very practical, but perhaps there is some application where they are (or else they wouldn't be on the market).

 

I say go with the Holley. I don't have the love of Qjets 57 does The more changes that leads to on an LG4, the better:lala: