Big Block heads wanted (no longer needed)

[MilkyNoSugar]

If anyone has a pair of aluminium heads available for a big block, please let me know what you have with part numbers and if they are bare heads or built up ready to use and I can pass the details on to the chap that is rebuilding my engine the check they are a match for what we need.

Ideally looking for Edelbrock or Brodix heads, high compression with 100cc chambers , big valves and oval port.

They are going on to a 1972 454 (actually 461 now) 4 speed manual convertible.

Thanks in advance.

 

[Roscobbc]

It's very important if buying used ally heads, (irrespective of age) that you check for waterway corrosion in case the previous owner hasn't used a proper coolant/antifreeze mix. I'm using Brodix Racerite oval port heads on mine.

 

[MilkyNoSugar]

It's very important if buying used ally heads, (irrespective of age) that you check for waterway corrosion in case the previous owner hasn't used a proper coolant/antifreeze mix. I'm using Brodix Racerite oval port heads on mine.

Understood and thanks for the guidance - I am not overrun with options, so new is looking quite likely at the moment.

 

[Roscobbc]

Had the Brodix heads on for some 10 years now......there are other options from alternate makers now.......AFR worth looking at. Look at my sign on details to see (with a few more cubes) what they can do.

 

[Roscobbc]

If you are using stock spec' pistons you'll need to match combustion chamber CC's on any heads you buy carefully. Also beware of aftermarket cylinder heads with raised exhaust ports.......they will in most cases improve exhaust flow figures (which most American V8 engines, even ones with modified heads can struggle with) - and yes raised ports will help performance and avoid the essential need for a cam with a longer exhaust duration.........but, you'll struggle to source suitable headers. And as a side note some of the big tube header are being discontinued.

 

[MilkyNoSugar]

The only heads that come up from our searches were also unusable, so new heads have been ordered - keeping things sensible though. Gone for Edelbrock Performer RPM 454-O High-Compression Cylinder Heads 60439, which should take the compression ratio up to 9.44:1 from 8.5:1

 

[Roscobbc]

Not a bad choice - standard height exhaust ports makes life a little easier - oval ports are great for street engines as they will give plenty of bottom-end grunt. Edelbrocks Performer RPM dual plane Air Gap inlet is arguably the very best street 'n' strip inlet manifold on the market and give little away to their Victor race inlets - their camshaft offerings however are a bit ancient for big blocks and IMHO should be avoided - there are better choices.

 

[MilkyNoSugar]

it is also getting an air gap intake manifold as part of this rebuild and we hope the bonnet fits when it all goes back together.

I have gone for a Comp Cams K11-236-4 cam kit (XM270H grind from the Extreme Marine range) with RPM1411-6 rockers and push rods. It has a holey double pumper 750cfm carb as well.

 

[Roscobbc]

Cam seems a good choice for street driven 454 - manual or auto. Be prepared for disappointment relating to carb/air filter/underhood clearance with stock BB hood.............

 

[Forrest Gump]

That’ll fly

 

[teamzr1]

Predicting flywheel HP & Tq
Though need sizes of valves, intake type, types of rockers and lifters, type of exhaust system and size