Question on AD Engineerings S10 swap kit

[Matt300ZXT]

They have a page on their site where it shows an AD truck mounted directly on the frame, and how the 2.8 v6 has a huge gap between the back of the motor and the firewall, and mentions even with a v8 the 4" gap still necessitates moving any engine choice back. Do typical v8 swap kits from JTR, Transdapt, whoever fix that or are the mounts ADE makes the ones needed to help clean up the gap? Once I thought about how much it'd cost me to get a steering kit to move the box outside the frame so I could install a v8, put a more modern brake kit on my truck, and other things like that, I'd end up spending a good bit of money and still have a truck on a 50+ year old frame so I'm contemplating their kit. That's why I'm thinking spend the money from a brake kit (for just the front) and a steering conversion kit, and I'm already in the cost of the chassis swap kit, and for a couple hundred more for the purchase of a beater S10. I could have the same cool old body, but on a newer chassis with new suspension, easy v8 installs, easier wheel choices, brake kits, etc.

I'm considering instead of a v8 in this route, just finding a 4.3 S10, which is still a capable motor, but just curious if anyone has personal experience with their kit and what they did to fix the gap if they kept a 4.3 or 2.8.