5.3 to t5 and electronics questions?

[Haaland]

So I have finally decided on a 4.8/5.3/6.0 whatever I find complete and cheap. I just put a t5 in my 66 and got my driveshaft cut so, I do not really want to have to get a new trans and driveshaft. I know the t5 is weak on a heavy truck and will probably explode but it will last me a few months. Till I can locate a t56.

First, I know I'll need a 621 bellhousing. Do the make a z bar for this? Is there anyway to use a SBC bellhousing for the 153t flywheel?

Second, fly wheel options? McLeod's makes a fly with proper spacing and you can run an 11" clutch. But it's $400. Part # 460535. Is there any other options for a flywheel that will bolt to the ls and be able to run a 10.5 clutch with mechanical throwout? I'd like to run the 153t flywheel so I don't need a new starter.

Third, I plan on running a megasquirt 1 for fuel and a msd 6010 for ignition. Is there anything else I will need to run the engine? I plan on running a cable throttle body so I don't have to use the drive by wire.

I have searched and found a lot of good information but still a little unsure about everything I'll need to do the swap easily.