460 Smog Delete and Oil Cooler Delete for a 78 Bronco Swap

[Gary Lewis]

The Crane instructions are on our site at Documentation/Electrical/Ignition and then the Instructions tab and then the Crane Cams Instructions tab.

[viven44]

I had a bronco with a Edelbrock intake and I swore it had spark knock while cruising and when I tried to accelerate while cruising. Never quite understood why. Now it all makes sense

[viven44]

Ok, will check it out !

[Gary Lewis]

Inert gas, which exhaust gas is, slows the flame advance.  So they increase the spark advance significantly when the vacuum is high, like at cruise.  Given that, you have to dial the advance back or you'll have spark knock.

[ArdWrknTrk]

Shows what I know about this place!  😂

[Gary Lewis]

I'm the archivist.  You suggested we archive that document, so I did and even remembered where I put it.  

[ArdWrknTrk]

I guess I'm good for something, once in awhile....

[Gary Lewis]

All the time.  

[viven44]

Well I caught hopefully a mild variant of “while I’m at it” and decided to peek underneath the intake and I found a valley pan, which Jim advised against for the Edelbrock at least. Looks like I’m glad I got into the intake.

[ArdWrknTrk]

With the crossover active you want to keep oil from coking on the bottom of the hot intake and eventually dropping chunks of carbon into the lifter valley.
The pan pretty much solves that....

But aluminum intakes expand far too differently than iron, and a one piece intake gasket will cause leaks (vacuum or water) at each head.

Some intake gaskets have restricted crossover, or you can get them blocked and drill a smaller hole in the sheet metal tabs.

It depends if it's a race car, a lazy weekend cruiser that can warm up in the drive or if you're using it for a daily and just want to turn the key and go.

[ArdWrknTrk]

viven44 wrote

Rockers and springs are clean as a whistle!   

[viven44]

Thanks!! Came from a very clean truck. Either 93k or 193k miles.

[viven44]

Since I’m this far an Edelbrock intake isn’t out of the question. Hmm what to do

To block or not to block
To valley or not
Aluminum or Cast Iron

This will be a weekend cruiser, maybe drive to work a few days.

[ArdWrknTrk]

The FIRST thing to do is install a straight up double roller timing set from an EFI truck.

Trust me....

[ArdWrknTrk]

An aluminum intake is worth it for the weight reduction alone.

[Gary Lewis]

Jim - I had wondered why not use the valley pan, but now I think I understand.  Thanks!  

[viven44]

Maybe a bit more than I can handle at the moment … we have 3 kids, 8,5,3

[ArdWrknTrk]

You have the intake and pan off.
How far are you from a water pump?

I would ABSOLUTELY NOT put a 460 engine into anything, with a retarded timing set.

[viven44]

I have a complete set for a 460, RV cam, lifters and timing set. For the bronco I just want to get it going asap as it’s overdue. Maybe phase 2 would be all of the above ?? The 460 even in stock form will be the best motor in a bronco ever, more torque (380 Ft lbs) than even the modern Bronco.

[ArdWrknTrk]

I wouldn't put an RV cam in a Bronco.
The stock cam and valve train is much better for the application.