Although the cylinder head is entirely dismantled, adding an external oil drain from the head into the block is a clever shift. Cylinder head porting might also give large stream improves. Although the Formal quoted ability of the RB26 was 276bhp, it’s normally been approved they designed more like 300bhp. https://r33-rb26dett-engine-for-s64323.loginblogin.com/34722311/r33-rb26dett-engine-for-sale-can-be-fun-for-anyone