428 owners, what type of block are you using?

[DKing]

For those of you sporting 428 FE's in your Cobra, what type of block are you using? Police Interceptor, Cobra Jet, Super Cobra Jet, or a standard 428?

I'd also be interested in what you gained by using a PI, CJ or SCJ block as opposed to the standard 428. (The only difference I'm aware of is the extra webbing around the main bearings. Are there other differences? Also, can you acheive the same level of strength with a standard 428 with a main bearing girdle?)

Main bearing girdle? I think that's the correct term. Basically a plate that ties all of the bearing caps together.

Dking

[Woodz428]

The main difference between the passenger/P.I. blocks and the CJ/SCJ blocks is supposed to be metalurgy. I believe the CJ/SCJ blocks are higher nickle content.

[FFR428]

I'm using a "406" block for the basis of my 428. It's a "62 HP" block and has the same std bore as the 428 4.13. It has the crossbolt bosses cast in, a oil presure relief , solid lifters,larger oil passages like the 427. The 406 was the forefather to the 427 and was only produced in 62 and early 63 and was the first block to be "crossbolted". I'm putting in a SCJ crank with lemans rods stroking it back to 428. As far as block metal I've learned from extensive conversations only some "race 428" blocks were made with a higher nickle content and the PI.CJ and SCJ blocks are pretty much the same. There is also an FE forum member making a cranksaddle support for the center maincaps.It is still in the development stage but in time after extensive testing will be put into porduction. G.