Trade: old-school pista 170 cranks for modern 165 ones

This is perhaps a long-shot:

I have a pair of almost mint 170mm super record pista cranks that I'm considering swapping-out for the modern version. (144bcd, normal pedal threads)
Mainly because the old ones are in such good condition for their age and I'm worried about shagging them up in a crash..
And I may as well get 165's whilst I'm at it, so I can ride indoors when they finish the olympic velodrome.

Cranks only, unless you happen to have a new-ish 50t chainring.

Here's what mine look like:

here's what I'm after:

I have no idea if I can use the same BB with both sets... please enlighten me.

The old record/super record (yours chainring should be a record one, not super record that is like this http://subtle.org/se/gallery/bikes/packaging/sr_pista_front.jpg.html, the arm should be the same) wants 109mm BB ( splindle with old campa logo stamped P) instead the new one wants 111mm BB (splindle with new campa logo stamped SP or SPc).

Thanks for the info!
Guess I'd be swapping the BB's too then.

(chainring not included, btw)

Bump

Did you manage to sort this out? I'm looking to do the same thing but 170 for 170 and not as shiny.

I just sold my SR ones in the end... haven't got new ones yet.

Fair enough, I might have to do the same and try and not spend the money on useless things before something I want comes up.