I am not sure if its the same SAE bellhousing (the Same engine is mated to the gearbox by a 40mm acetylene torched adapter plate) but i am afraid you'll have a hood that is 15cm too short for this engine. The Crystal engine was extremely spaced, 15cm center distance of the pistons. (thats why they can run stock engines in tractor pulling while others need a host of modifications to withstand the power and heat)
About power, i am not sure if the back end can take the power, the 11441 and 11741 had a reinforced clutch, and the rear end too i believe.
Nonetheless, a 14145 engine will win at low rpm, but in mid rpm (1400-1900rpm) the 16 valve Forterra engine is stronger. the last 16245 had 522Nm of torque i believe, while the Forterra 135 is doing 570Nm.