We are learning a few things during this build...


Heads:
It looks like I need to go to standard length spark plug tubes instead of the long ones I had used on my 426-1 heads...The long ones definitely don't fit and we pulled a brand new MP set out of the box and those do fit. So there went another $100...

Cam seems like it wanted milder springs than the heads came with. Heads are set-up for 240 closed, and 420 open if I remember right. Or basically a +.700" roller cam.. While my cam only needs 140 or 150 closed, forget what it needed open. So I have a lot more spring than I need, not sure if I will change them. One nice thing that was noted was they are smaller in diameter and should clear standard valve covers better if that was something someone had to have, but we don't need...Still need lash caps as I forgot to order those, nother $100 I am sure. They check out very good when vacuum checked for sealing and blued up to check contact area. There is also a big increase in flow as I had a local shop flow them. Only thing that concerns me with fully ported 16 bolt heads is the lack of sealing surface between the bolts and intake ports...If this becomes a problem, all my intakes will be for sale to switch over to 10 bolt intakes as the heads are drilled for both. RTV is going to be my friend it seems.

We did notice some inconsistences in the rockers stands though. We are still mocking it up, and where they are pinned is not always correct. We have a set of OEM Cast Iron ones that line up perfectly so we know its the stands.





Block:
Is looking real good. Crank is in with one piston and rod for checking...We had it clearanced for the 4.75 stroke, but we have a ton of room around the rods. Looks like it was clearanced for aluminum rods as well. No biggy. It was taken apart and thoroughly cleaned after hone. We noticed with all the blind holes none seem to be drilled so deep as to break into the water jacket or the crank case area, so no thread locker/sealant is needed...Very nice change over the World block. We also drilled the valley oil return holes at the front and rear of the block bigger since it is a street engine. And man is it light!

Cam bearings fit the cam perfectly as the cam is already in. The pan rail is also very large, should have thought about the optional machining of it more.