Front tire dilemma

AJ/FormS said
245/60s need 8" rims for proper long-term treadwear at performance tire pressures exceeding 30psi.

They will fit on 7s but these will pull the outboard edges of the tires up off the roadway. In an effort to get the edges down,you will need to drop the pressures way down. And then, when you rip around the turns the weight of the car will whip over to the side and pull the inboard edge up off the road, drastically reducing your grip. You will have to get used to that, and change your driving style, so you don't be doing 360s everywhere, which gets to be a lil embarrasing.
My 235s are on 7.75" rims, and I run them at 29 for even treadwear,with a 360 under the hood.

As you have figured out 3.5bs is not enough on the back. With the proper width rims for the tire, at decent pressures beginning at 29, you can run your rubber very close to the springs without rubbing. 1/4 still works with street ride heights that keep the springs closer to flat. The higher you raise the rear, the more the car will sway in the turns, and with highly arched springs,the rear end will drift sideways some. You look to have plenty of room back there. I think you mightabin able to run a 4.5bs, which is what I run.
In any case, too late now, you took the least expensive route by raising and trimming; and I think your rear will be alright. I would start them off at no more than 26psi and keep an eye on the treadwear. Ease into the turns until you see what's what back there.
The front tires I'm pretty sure will rub on the strutrods at full lock on one side and may hit the frame on the opposite side, and will probably tag the fenders on the frontmost side. I had to trim my fenders quite a bit.
I usually run 1 to 2 pounds higher in the front to compensate for the heavier front weight.

Thanks for all the information.
I know I went too fast buying those Rim Wheels but they are the only type that I like which is available here for these cars. I was not expecting the backspace on them was half an inch less than another 7x14 set I have from the same 70's manufacturer.
I do not have many options here as far as Wheels because these darts made in Brazil have a different bolt pattern which is 4.25 inch, just like Ford, then sbp or lbt will not work.
I just hope I get a good grip on the rear running from 26 to 30 PSI.
as far as the front I will need to finish the suspension work to find out but I guess I will have to replace the front tires.
I also think the rear was too low...
You think longer shackles would be better than rearching the springs like I did?
It's got a 318... 0 to 60 in 9-10 sec...so all the fun is on the turns..
The thing is, I like that style wheel for this car so I will have to mix tires if I can't fit them there without looking ridiculous...
And I think I will cover those white writtings...it is a 4 door...