Dumb question about FE motors

[Karl Bebout]

Mikiec, NOT TRUE! and Lord knows I've tried.

[lovehamr]

Originally Posted by Danr55

Well guys, I don't really care what block it was cast as originally. I've measured the bore and the stroke and it is definitely a 428 motor. Bore (4.128 measured) and stroke (3.982 MEASURED) can't be anything else. The given dimensions for the bore and stroke are bore: 4.132 and stroke: 3.98. So it could have started life as a 302, but it's a big boy now.

Thanks for all your help guys.

Well here's another one Dan. While looking for a 428 for my car I found that the 428s also have "428 cast inside the water jacket behind the center core plug. take a look and see if that is there. Anyone else hear that?

Steve

[mikiec]

Stevie...

A package is finally going out this weekend.

Mike

[Fordzilla]

Originally Posted by lovehamr

Well here's another one Dan. While looking for a 428 for my car I found that the 428s also have "428 cast inside the water jacket behind the center core plug. take a look and see if that is there. Anyone else hear that?

Steve

Steve, I think the true 428 service blocks had that casting.
Regards,

[patrickt]

Originally Posted by Fordzilla

Steve, I think the true 428 service blocks had that casting.

Let me just rip a quote and pic from the 428 Cobra Jet site http://www.428cobrajet.org/id-block.html

Some blocks have a "428" cast onto the floor inside the water jacket. There are two common positions to view this protruding number: one is just inside the center freeze plug hole, the other is directly beneath the long coolant slot at the rear of the block. If present, you can be sure the cylinders are thick enough to support 428 pistons, core shift permitting. If the number is not visible from either position, you'll need to make other verification checks. Measuring the gap between cylinders using a drill bit is the easiest way to determine whether your block is capable of supporting 428-sized cylinders. It is presently thought that if the shank of a 15/64" drill bit will NOT fit between the cylinders at any reachable spot in the six core holes, the cylinder will likely handle a 428 bore, core shift permitting.



"428" Casting Mark Inside Water Jacket
Picture courtesy of Paul Cavaghan