Donsz,
Thanks, trhe deal is very simple: the 261 is somewhat common in the classic car scene here because of the chevy trucks produced here during the 60's using them. From times to times, someone asks me to assemble one. Like all other bigger american made engines available here, they use the rope rear seal. I assembled a lot of 318 Mopars, and for these ones I can get a seal for the Magnun 318 for Cherokees(part is available here, no problem, and works perfectely, no to mention that it is inexpensive) so I naturally assumed that the same process on a 261 would be desired. If You have one laying around of course I want it. The only issue is how to pay You for this, since the bank charges me a US$50,00 fee for any amount of money send overseas. Thanks anyway!!