Noel; 79.4mm crank, 119mm rods, 86.5/87mm custom pistons, that's "RB29" done.
Its worth noting that RB capacity always seems to be rounded up, for example 77.7 (Tomei, HKS) and an 86.5mm bore comes to ~2738cc's but its called a 2.8. 79.4 stroke and 87mm pistons comes to ~2832cc's and is known as a 2.9. Apexi used to sell a kit just like that.
It gets closer to 3L capacity but still comes up short on the stroke of a 30 crank.