I would look into Cold Case radiators. The Champion radiators I have seen fit well and seem to work but I'm not a fan of radiators with more than 2 cores.

The ECP radiator I have required some modification to fit. I wasn't thrilled I had to drill holes in my core support but I did it.

The Cold Case radiators are said to be a drop in fit.mi would certainly look into them.

Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston