Long rod setup with a short rod

[grantevans713]

So I've had a busy winter with work and very few days off. Dropped one of my banshees off at a buddies for an overhaul. 

 

Got a bore done on cylinders, new pistons, carbs rebuilt, new cylinder head, domes, etc.

Well he set it up for a long rod with cut domes because it's a 4mil crank, except it's a short rod 4mil. Today he got it going and took it for a test ride. It died halfway through third. Kicker won't move. How much damage should I expect inside the case? Just a new crank? Pistons probably shot? The case seems fine, he says there was no pop or crunch, it just revved then puttered out. Before he mentioned the kicker not moving, I thought maybe electrical. 

 

Any ideas what may have happened? What damage should I be expecting? How fucked is it?

 

 

[97Screamer]

Air leak. New pistins, bore and likely crank. Make sure he does a leak down test after the next rebuild. Better yet take it to someone that knows what they're doing.

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[grantevans713]

8 hours ago, 97Screamer said:

Air leak. New pistins, bore and likely crank. Make sure he does a leak down test after the next rebuild. Better yet take it to someone that knows what they're doing.

Sent from my HTC U11 plus using Tapatalk
 

Passed leakdown, held over 6lbs for 5minutes.

[375hp banshees]

Explain set up for

Going from? 

Stock port timing ?

Pistons used?

Domes used?

Does it pass leakdown now?

Case seems fine as in no rod sticking through & guessing...Damage found after?