The timing belt can be replaced with engine still in car. It may be tight and fiddly, but it can be done anytime, just same space as 4efte replacement.
Once the engine is positioned appropriately, all mounts can be made. I started from the drivers side, then the firewall, gearbox, then front. Thats the biggest job i guess cos the rest is now a walk in the park.
The conversion is not difficult as many think, its just the time required to get things done. Once the idea is constructed, then you can begin making things, like mounts, brackets etc.
Im not a pro welder, i started with arc/stick welding, and now just recently a mig welder, im yet to be even more skilled in the art of welding.