What's the best gen 454 block to build?

[Honky Kong jr]

Open Hole?

If you splay a 4 bolt block which I don’t recommend.

 

[Paladin]

Oh, OK, worried me for a second, thought I had missed something in my build and I had empty bolt holes! LOL You guys are way more advanced in this engine building stuff, but splaying it was never a consideration. Question , why would you even want to spl

If you splay a 4 bolt block which I don’t recommend.

ay a 4 bolt, just curious.

 

[Honky Kong jr]

Oh, OK, worried me for a second, thought I had missed something in my build and I had empty bolt holes! LOL You guys are way more advanced in this engine building stuff, but splaying it was never a consideration. Question , why would you even want to spl


ay a 4 bolt, just curious.

Strength. It spreads out the clamping load to a wider surface and helps with cap walk.

 

[Paladin]

OK, understand that. I thought that was the whole purpose of 4 bolt vs 2 bolt to begin with tho.

 

[Honky Kong jr]

OK, understand that. I thought that was the whole purpose of 4 bolt vs 2 bolt to begin with tho.

Yes, splaying just goes a step beyond the capabilities of a 4 bolt. You can still get cap walk with a 4 bolt. Good bolts or studs help.

 

[Paladin]

Yes, splaying just goes a step beyond the capabilities of a 4 bolt. You can still get cap walk with a 4 bolt. Good bolts or studs help.

Makes since, kind of glad I didn't know about that before I did my build. lol That would have required another executive decision and undoubtedly more money at the machine shop!

 

[ajd89]

Not to but in but since you 2 are talking about gen 4s were they all 4 bolt mains? What about mark v?

Edit in trucks anyways

 

[Honky Kong jr]

Not to but in but since you 2 are talking about gen 4s were they all 4 bolt mains? What about mark v?

Edit in trucks anyways

Not necessarily. The last 454 I got out of a big ass Winnebago was a 2 bolt.

 

[ajd89]

Not necessarily. The last 454 I got out of a big ass Winnebago was a 2 bolt.

Really that seems odd. Have to pull the casting numbers then?

 

[Honky Kong jr]

Really that seems odd. Have to pull the casting numbers then?

Those are kinda vague too. According to the casting numbers on my 402 it comes up as a 70 454 or 402.

 

[ajd89]

Those are kinda vague too. According to the casting numbers on my 402 it comes up as a 70 454 or 402.

Well that sure helps! Lol

 

[Honky Kong jr]

Well that sure helps! Lol

The pad numbers are more helpful then casting numbers. Kinda like street address and zip code. A zip code will get you close an address will get you there.

 

[ajd89]

What are pad numbers?

 

[Paladin]

Yep my casting numbers were kind of confusing too, said it could be this or it could be that.

Those are kinda vague too. According to the casting numbers on my 402 it comes up as a 70 454 or 402.

 

[Honky Kong jr]

What are pad numbers?

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The numbers and code and partial vin are stamped into the block. Mine are cone due to the block being decked. There is also a pad mid block below the intake manifold.