[Tigers] 260 Pistons (again)

[Theo Smit]

If they'll let you run a 289 then do that... the extra displacement 
gives you power for no extra money spent. In fact, since the 289 is a 
lot more common than the 260, it's likely much cheaper to go 289 than 260.

Will they let you run a 6 bolt block? Since it's correct for the Mk2 
Tiger, there shouldn't be any issue in that direction.
Spend your money on a good (lightweight, forged) crank with the 289 
stroke. If they let you run a lightweight (steel or aluminum) flywheel, 
do that. You'll be amazed at the extra pick-up you get from the reduced 
inertia.

Good luck,
Theo