KE70 is different to all other K-series engine mounts. I'd probably say the same for the Van's which had K engine's in them, but I've
never been in the engine bay of one of them. The KE70 mounts are about 30-50mm longer on each side, so I'm assuming they're
only on the subject of CA > KE70 here. Engine mounts aren't expensive to make up when put into the bill of a whole engine conversion.
I'd say gearbox crossmember AND mounts no more than $500 on top of a $4000+ engine conversion if made at a shop.
Back on topic to subject;
If you're looking to do an engine conversion, you're not going to find your answers sitting on a computer chair and typing into a keyboard
without pissing people off. You'll only get a biased view from everyone and turn it into a big argument about Nissan versus Toyota. Find out
what sort of power each engine has been making --> Look at the sorts of mods that have been done to each engine to achieve that power -->
have a stab at what each of these mods cost on TOP of conversion guesstimate --> twiddle your fingers --> conclude.