I would think it would fit OK, see the link below where the guy but a BB mopar in one with the stock frame.
personally I like to change the frontends over to something more modern. like the fatman front stub and mustang II components with the Big brakes and power rack and pinion, less clearance problems with the rack in my opinion and if you wanted to upgrade to coilovers or air ride, its very easy to do. Ron....

I have never done one of these cars so I am just applying general streetrod ideas here....



http://www.cardomain.com/ride/2062763