So my engine builder (Norms Custom Engines in Chilliwack BC) has had my engine for almost a year. This was not unexpected when I delivered the engine to him last October but the timing was messed up as well by how hard it is to get the parts he ordered for these six cylinder engines. Any way that is all behind us as of yesterday as he sent me this photo of the engine as it sits today. It will be given a couple of coats of high build primer then sent to the Dyno.
for a proper break-in, tuning and pulls to determine output. Should come in at or around 300 HP. I will post dyno results and engine details as they arrive.


Engine without paint. Being primed today then off to the Dyno.

 

Can you give us a run-down of the parts that are used in your 300 six?

 

I will provide Dyno results and Parts used in the build as they become available to me. Likely upon receiving the engine in a week or so.

 

So, I got the dyno results for my trucks engine. I seem to be missing just over 100 HP from what I was lead to expect. That said 284 Ft Lbs of Torque and 189 HP is a nice bump up from the 114Hp and 223 Ft Lbs that Ford Advertised in these engines in 1979.

In discussing these results with my engine builder he tells me that the Offenhauser dual plane manifold is somewhat restrictive and a more open plenum could easily add 20HP and corresponding torque.
Also I questioned why only 28 degrees of total timing as it seems to me that the engine should be ok in the low to mid 30* range and that would also add more power. - Norm - engine builder - agreed and said he had noted that as well.
Lastly, it seems that the cam could have been a bit more aggressive. I asked Norm about it and he said basically that cam was the only one he could find that was not an OEM grind. It seems that a lot of the performance Mfgrs have dropped production of Performance parts for these engines.

That all said I believe with the addition of the M5OD-R2 trans backed up with 3:27/1 rear diff gearing it should make a nice driving truck. Once I have the engine in hand I will be able to post what went into it for parts.

Dyno Result Details

 

That is about right.
Power Nation got 305 lb ft and 206 hp with a very similar build as yours. The torque and power rpm peaks are very close to yours.
They used a Comp 268 cam and an Offenhauser C intake manifold.
The dyno runs start at 14 minutes into the video.

 

In order to get 300 hp, the camshaft .050" durations need to be in the 230s.
Flat tappet camshafts are no longer available, and we have moved up to roller camshafts and lifters.
You will also need roller rocker arms.

The Promaxx CNC ported, big valve head is a requirement.
We have also upgraded to the Molnar "H" beam connecting rods and DSS 300 six forged pistons.
The Offenhauser C intake manifold works with a 650 cfm carburetor along with Hooker headers.