has any one tried or know if u can fit the b2600 16v head on the 4g54 block or if the block bolts on the tm gearbox bell housing?

Won't work. 3 valve per head is basically reverse of the current head, so the exhaust outlet would be close to the firewall and the air intake would be at the front. Not worth your time. Apparently a volvo doch four cylinder head may bolt on.