Hi,I am looking for opinions on using a 429scj intake on my 460 in my 79 F350 crewcab that will be used for towing a 38ft gooseneck with a drag car.
Current set up is that way I bought it and it runs fine but I just wont to make it run better:69 460,10:1 comp,524 lift cam,iron exhaust,mid 70s factory intake for a 4530,has a modified egr plate with a holley dp.Truck has 4.10s and 4spd.
Chris

 

That will probably give you a better pull when you get above 3000, but it may not do much for your low end. My $.02.

 

Hi,I am not as concerned with adding to the lower end.I am installing a spicer 4spd auxiliary that has 2 under drives and a .84 over so I will have 16 gears.
Adding more top is the goal and 80mph loaded.

 

which heads do you have? if you have the passenger car heads, the SCJ intake ports are way bigger then the passenger head ports and cause a huge mismatch. would probably hurt more then it helps. (look at the intake gasket meant for CJ/SCJ heads compared to standard heads for visual)

i would look for a good aftermarket intake like the Edelbrock RPM performer or Weiend Stealth meant for your heads. besides saving a ton of weight, they have better ports matched to the passenger style heads. this would be a better option in my opinion. also i would use a good set of headers and dual exhaust as these 460's need all the help they can get on the exhaust side.

rgds
Mike

 

Hello again,the 460 has C9 heads on it with smoothed exhaust ports and iron manifolds.I refuse in install headers on any thing own. Maybe PI manifolds in the future.It has 2 1/2" duals with flowmasters out the rear.I also dislike flowmaster,so they will be leaving too.
I know omc put scj intakes on 460 marine engines in the 70s,same deal with pass heads and cj intake ports and found they made more power than the standard intakes.
The cam is a isky megacam with a 524 lift.I also found a place to buy the scj marine intake new that is cheaper than any of the aluminum intakes.
Also when I put in the auxiliary 1st in the main and LL in the rear box will be 13.5:1 with and I will be able to split the first 3 gears in the transmission 3 times and have overdrive.
Chris

 

Weight? Did you read what his application is?
Whichever intake you go with it can be portmatched. It is easy to do an intake only swap but the head should be checked and then you can open them up to match or swap them out. If the SCJ intake is cheap then go for it.

No, really they're ok, and putting on headers doesn't change the small exhaust port size. To a certain extent, if you open up the intake AND the heads, you may need to open up the exhaust. The stock manifolds flow plenty of air for a mild built 460.

With that said, if you do decide to replace the intake, your bottleneck will now become those C9 exhaust ports. I would think a good port job would go a long way with those heads to alleviate that issue.

I would honestly try all of your trans stuff first and just see how it pulls. I think you will be surprised how well it does.

P.S. Does that thing idle really rough with that cam?

 

I agree with cbakker, your trans setup sounds neat and may make changes to your engine unnessary.

The ports in my SCJ manifold on my Torino are HUGE. I dont think just the intake will make much difference unless there is some exhaust side work done, may even hurt throttle response.

Keep us posted. I'm curious to see how the gearbox mods workout.

Todd

 

Good afternoon,just got done moving snow again.Hopefully the last.With the cam that is in it when it is cold with the choke closed it sounds like a fuel car,but after it warms up it idles around 750/800 rpm.It sounds really good I just hate flowmasters.My 71 Mach1 is 429scj car with a repo Holman/Moody hydraulic cam has less lift ,more duration and split lobe centers and has a way worse idle.
I just like cast iron. Maybe I will take the advice and drive it see how she does with the two transmissions.
By the way the auxiliary I am looking to put in will also allow me to tow loaded in overdrive because they are designed for 80,000 lb semi trucks going down the interstate..
Chris

 

OK, off topic but VERY NICE!!!

I have a '70 Torino Cobra 429SCJ, factory drag pack car. One of these years maybe I can afford to finish the restore.

Todd

 

Hello everyone,I just wanted to let you all know that I did in fact change the intake.I put on a 429 police interceptor intake.It is the same as a scj intake just with a spread carb pattern.So I opened up the secondary bores in the carb pad to accept the square holley and bolted on with no spacers or adapters.I also recurved the distributor.
Ultimate real world end result is holy-s&#t.It runs like a bat out of hell.Now on to installing my alcoas and a million super trucker gears

 

Chris. Which aux tranny are you using? Were you able to buy yokes to adapt to your u-joint size, or do you have to make adapters?

 

I will be using a 6041 spicer which is a 4 spd.No adapters,just the yokes which will be welded on to the shortened driveshafts.
Chris