I just bought a pair of SCJ heads (D0OE-R). wondering if the normal 429/460 intake will work, or do I need the SCJ intake?
my truck is gonna rock!!

 

You'll need a CJ/SCJ intake. Intake and exhaust CJ ports are much larger than standard production heads. If they're virgin, be sure you port both intake and exhaust.

I/E flow at .600 lift before porting
I-302cfm
E-158cfm

After
I-343cfm
E-204cfm

(thanks to Walt Barnes)

There's demand for DOOE-Rs from drag and puller racers who are restricted to running iron heads and from the restoration crowd.

If you're not bound by any of those requirements, you might consider selling them and going aluminum. With what they're worth and what it takes to make them right, you should be right at the cost of a set of brand new set of finished aluminum aftermarket heads.

There are some distinct advantages in running aluminum versus iron:

you can run one full point of higher c/r without detonation on pump gas

When the hp addiction kicks back in even stronger after this mod, you have the potential to expand with adequate head flow already in place

Weight

I'm not trying to buy your heads. I've been messing with the 385 for a long time, as have others I know, and everybody who pursues the interest says the same thing; if you're serious about performance, be it street or race, don't bother with iron heads unless that's what you absolutely have to have for whatever reason. You don't see many used aluminum heads on the market.

 

that is a darn honest anwer. Just remember if yu score something you dont need . Pass it on to build your truck better.. Thats how I Got $2000 grand worth of tires

 

I thought the CJ/SCJ intake ports were different,I guess that would have been evident if the heads were here(bought online).
I do mud bogging, and some event sponsers require aluminum head vehicles to run in mod or super mod cass against all the tube frame, custom race trucks. mine is better suited to pro street class as it is mostly stock.

78 shortbox 1/2 ton 4x4 429cid
5:13 gears, spooled front and back
40" tires and adding SCJ heads

 

Sounds like you're restricted to iron heads and Pro Stock is a very competitive class. Properly prepared, the DOOEs will do what you need. When you port them, or have them ported, don't forget to match the intake manifold runner openings to the intake port. Without the porting and blueprinting, they don't flow much more than a stock DOVE head. So much for myths.

When they're ready, spend $25 and have someone flow test an intake and exhaust port. That's about the only way you can accurately select a solid lifter or roller cam that will match the breathing capacity.

DOOEs are not a low rpm head. With the big intake port/valve and restricted exhaust ports they develop poor intake velocity below 2500-3000rpm. Years ago I ran a set on a street/off-road 4x4 truck and was very disappointed because my primary torque requirements were at off-idle to 3000rpm. Live and learn.

Most of the racers, drag, puller and boggers, are spinning non-stroker, non-roller cammed competition 385 engines at 6500-7000rpm. That's with roller rockers and about the max for stock or CJ rods. And you'll need at least a 850cfm carb to feed those heads at operating rpms.

 

Thanks for the info George

 

The SCJ heads will support up to 625-650 HP naturally aspirated...if your hoping for more than that you need to get a set of SVO heads. You'll see an easy 100-150 HP increase over the SCJ heads assuming your set up to make max HP (roller cam, dominator, 2 1/8" or larger headers, etc.) The other "street" style aftermarket aluminum heads (such as the Edelbrock) are a step up from the SCJ but will no where flow the numbers of a prostock style head. Years ago I ran a 514 c.i. with SCJ heads and made around 625 HP but the engine made no more power above 6,600 RPM. After switching to a set of early style SVO heads with 2.30" titanium intakes valves I instantly went to 720 HP and the engine was still pulling strong at 7,600 RPM! My E.T. dropped from 10.20's to 9.70's after some more tinkering we scored a best of 9.57's in the quarter with a 3,200 lb. Ranchero (fully tubbed, wheel standing starts). Deen

 

If I can get 600 horse out of this engine that will be twice what I have now.