Aqua FBody

How much will it cost to have a port and polish job done to my 91 RS

PETE

iTrader: (1)

If you go to your local hooker corner I'm betting not much more than $50

Aqua FBody

To the engine not me

Justin 87 GTA

iTrader: (3)

porting and polishing what,. the intake, the heads,.. etc,..both? mild or full port,.. do the mild port yourself,.. , also,.. do you want them to dissaemble and reassemble too? this can range form $400-$2,500 depending on the variables. it'll cost you $100 for the tools if you do it youreslf.

Aqua FBody

All I want is the intake and can you explane what I need to do to make it work if I did it myself

Justin 87 GTA

iTrader: (3)

The truth is,.. if you have 3,1L, you are better off saving your time and money and getting a junkyard 305/350. Much better bang for the buck,...you can get a nice 305 for free w/ low miles.

Aqua FBody

Well my buddy is giveing me a working 350 out of a 71 le mans could I get that thing to pass emissions

five7kid

iTrader: (14)

You can get it to pass emissions if you have a full electronic fuel injection system, either TBI (throttle body injection) or TPI (tuned port injection) from a '91-later 3rd gen. All controls, sensors, cat, etc. The best way to do such a swap is with a complete donor car, whether you use the engine from it or not. You'll need other things that aren't emissions-related (transmission, engine mounts, etc.). Obviously, this isn't a simple process.

You can port the intake yourself. You'll need a die grinder, either pneumatic or electric - not a Dremel, they just don't cut it. Air die grinders are pretty inexpensive, but you need a pretty healthy air compressor to run it - not your typical garage hobby compressor. Electric are more expensive, but less than a pneumatic and air compressor combined. You'll also need some carbide bits. I don't know the details of what a 3.1 intake needs for porting, but if you gasket match the ports, for instance, if you don't do the same to the heads it will actually hurt you.

I'm not convinced that's the best place to look for performance. Exhaust upgrades and cam would probably make a lot more difference. Or, swap in a 3.4 V6 (not completely straight-forward, but less complicated than a V8 swap).

83 Crossfire TA

iTrader: (2)

Um, a '71 Le Mans will have a pontiac engine. The 350 poncho is not a great choice for a performance application and is far from a simple bolt in into a 3rd gen f-body. There is supposed to be a company that makes headers for the swap, but you're pretty much on your own for the rest of it. You'll also need a BOP style tranny to bolt up to the engine.

You will never actually have a smog legal setup in the car even if you get the thing to run clean enough to pass. You'll also have to improvise with the intake/carb setup unless you want to run the 71 carb and intake or go completely aftermarket.

five7kid

iTrader: (14)

Aqua FBody

Can my 700R4 handel the 350 or do I need to take his Turbo 400 and make new trany mounts.

83 Crossfire TA

iTrader: (2)

OK, this is quickly getting old… You really don't have a clue and can't seem to read what I’m saying when I'm trying to give you one.

To repeat what I already said, the '71 lemans has a Pontiac block, it WILL NOT bolt you your chevy tranny. It will not just bolt into your camaro, will barely fit in the engine bay and would require you to do just about everything custom. From the questions that you're asking that's never going to happen…

For that matter, before you even ask, your 60* V6 chevy tranny will not bolt to a chevy V8 either. It pretty much will only bolt to a 60* V6 or a 2.5L I4 Iron duke.

The Pontiac TH400 uses a different mount, driveshaft yolk, a different kickdown assembly and has no previsions for a torque arm mount. All of which will require you to find an aftermarket solution or custom fabricate something.