Block problems?

I took the deck off a knackered B20 (i got as free scrap some time ago) 2day.
and i found a 3mm gap that had blown through my 800mile old head gasket between cyl 2+3 and also on 2+3 the bores were scored serverly by the rings - looking at the scores its the usual overheating signs
but, on cyl. 1+4 there's patches of extreme highly polished area's (exhaust side).
I havent took the block apart yet, but at this stage, any idea's???

I've ran it on a good head with new oil/gasket/water.

The original head had sticking valves.

When you get polished areas on rod bearings, that's a sign of improper seating. Maybe the same goes for rings and cylinder walls? Just a guess.

either severe overheating or lack of lube caused that... it sounds like you overheated massivley... i woudnt reuse that block or the head because theyre both prolly waped

In the 800miles it ran for with the good head, after 5thou rpm it had a heavy resinating witch i could never figure out. it used to rattle the gas pedal spring - wierd!

Was hoping you wouldn't say that i was wondering if i could use the block again after i rebuilt it. i was planning on a polished crank, forged teg R' pistons, race bearings, and skimmed face.

Surely that would be reusable?

Measure the head and block surfaces, check for warpage. Chances are you can probably reuse and remachine the block.