G'day my name is Dean and Im from Australia, I have a 74 620, over here they only came out with j15 engines Im planing on puting a l20b in it with a 5speed z box, just wondering if anyone knows of any model engine mounts which may fit, ive been told that 180b engine mounts may work, I think I may have to also use reverse semp to clear steering arms. any help would be great. thanks  Dean

Shoot a couple of pics of your exsisting mounts...
I think you have to cut the mounts off the frame and then weld on some new lower ones to the frame...
I have a couple spare upper L20b mounts I'm not using but postage would be prohibitive...