No pork-pie hat, but here's a Jag IRS in a '49. On bags. Narrowed 4" and bed tubbed to get the tires to fit under the rear fenders
The front suspension, also on bags........
And if you want any kind of headers that fit the rear-steer Jag rack - forgetaboutit - I fabbed this set
High hopes for good handling and a plush ride with the Jag setup.
You can weld a Jag IFS/IRS in a chassis in a weekend. There's a fair amount of fab work for this one though. If you'd rather drive than fab, I'd look into Industrial Chassis' front end kit or one of the already-engineered Corvette suspensions.