I will be shocked if there are kits available for this conversion. The Chevy in Jag has been quite popular and there used to be a company in Dallas, Johns cars, that had very nice kits that almost made this swap a driveway, Saturday project. To my knowledge there are no such products available for an SBC in MB.
I have seen pictures and read extensive description of Richards project. It was a beautiful job! Richard is obviously a very savvy and experienced engine swapper and fabricator with an adequately equipped shop. If you don't have his skill, experience and equipment, this would be a tough undertaking.
If you do have all these ingredients, then go for it.