KV/3B differences

[flat out 90]

Im trying to find out the differences between a KV block and a 3B block I want to use a kv block for a 400bhp project I’m thinking of doing.

I’m sorry if this has been asked before.

[M2ki]

Same block. Only turbo oil return hole is not drilled.

[_ShurikeN]

KV does not have oil squirters.

[flat out 90]

Same block. Only turbo oil return hole is not drilled.

ok thank you that can be changed.

[flat out 90]

KV does not have oil squirters.

Is that something I can add

[flat out 90]

I’m assuming it’s only a case of drilling the correct size hole gallery

[M2ki]

KV does not have oil squirters.

You are correct, forgot about that.

[M2ki]

Is that something I can add

Not easily. Surface is not machined.
Also from some old thread, most KV blocks seems to have the breather.

I will be converting a KV block to S2 spec and have found out that thier is no oil breather or any oil sprayers on the KV block but my big concern is one of the water gallery ports differ from 20v blocks which means adding material to the block

[flat out 90]

Ok well I have a breather on the side of my block iv just looked.

But im wondering if it would be easier to go down the 7a route and have liners put in.

[M2ki]

Why liners? Wouldn't it be cheaper to buy bigger pistons for 7A block?
NG has the same block as 7A.
Newer NG has same waterpump/timing belt system like ABY.