Anyone done a strong 400 build ?

I'm interested in the 500+ CID,
500+ HP club membership, on the budget plan.

The kits are very reasonable and all forged , as Ill be running some N2O
Lots of cruising, occasional street racing, etc.

I'm looking for Peak power at a lower rpm, (tork monster) most importantly, high durability
I assumed you meant street and high durability. I stand by my recommendation it's all shelf stock as well.