how far would you go?

[crenbbf]

I've got my eye on a set of forged 428(std) pistons.

Can my 360 block be bored take them safely?

thanks

[blykins]

I wouldn't count on it.

About 10 years ago, I went through the song and dance of trying to find a few blocks that would go to a 428 bore. Even ones that sonic tested thick enough sometimes hit casting flaws that rendered the effort useless. Went through about 3.

Easiest way to gain cubes is to buy a 428 or 427 block, or to buy a stroker kit.

Not worth the trouble and expense to try to bore these old blocks out.

[crenbbf]

Thanks

Problem being is 427s and 428s are rare as hen's teeth over here and command premium.

Scat kit is more or less a done deal so I'll go with that.

Best to stick with the 4.250 then or can I go to the 4.350?

thanks again

[blykins]

You have options of 3.980, 4.125, 4.250, or 4.375. The first 3 are Scat cranks, the last one is an RPM. The first 3 also have off the shelf pistons available. The last one will require a custom piston.

[LMH]

I have an unused 390 "mirror" block bored for a 428 rotating assembly. The shop that did it had to constantly sonic check the bore as they machined it but it did turn out ok. I ended up not using it and went with a 351W instead.
I should point out that the business in CA where I bought the block went through about 7 blocks until they found one bore-able. It wasn't cheap and I wouldn't go that route if I to do it over again.
Larry

[crenbbf]

Thanks Guys

I'll stick with the standard bore than

cheers

[Keithc8]

Just do a 4.080 bore along with the 4.250strroke crank. Will have done several of them and they work just fine. If we can help on the kit just let us know. We also have some 428 blocks and could you a complete stroker short block with it that would give you about 460C.I. engine.
Thanks, Keith Craft

[crenbbf]

Originally Posted by Keithc8

Just do a 4.080 bore along with the 4.250strroke crank. Will have done several of them and they work just fine. If we can help on the kit just let us know. We also have some 428 blocks and could you a complete stroker short block with it that would give you about 460C.I. engine.
Thanks, Keith Craft

Thanks for the reply Keith

Maybe you can quote for the short block plus shippng to PH1 3JL?

cheers

[Barry_R]

Agree with the others on the overbore.

We have had several blocks come in from folks that purchased one of those ebay "standard bore 428s" that always are available from one or two sellers.

With very rare exception they always have cylinder walls so thin you can darn near see through them. I've measured some at .060. And I've had at least three rebuilds come in that were split cylinders after getting built.