need help purchasing street radials for my 74 dart sport

I am running Vision 521 Nitro wheels 15x7 with 4” backspace (0 offset) up front with 215/65R15 (max size that fits) and out back Vision wheels again 15x8 with 255/60R15 (could easily fit 275/50R15 as those aren’t as tall but a hair wider). My tires are cheaper Mastercraft Avengers (same as Cooper Cobras). I have B body rear axle so my rear backspace is different so I am not recommending backspace for you and I am running Espo 2” lift springs. Up front I did the factory disc brake swap and 1.03” torsion bars set roughly stock ride height. Suspension is firm but not bouncy and nothing is binding as of the few miles I tried this setup.

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