Thanks all! So I guess the rim size being 1" taller is not really the issue? Rather it's the width of the tire that causes the rubbing.
I've already compensated for the tire width on my 14x7's when I installed the 245s by moving the rocker panel side of the front fender back ~1/2". The front part of the fender already cleared by ~1/2".
As such, I may be able to use 245s on the 15x7s?! 
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* '69 Custom S - 2dr Hardtop Coupe - Rust-free Oregon survivor with all original panels and original trunk floor
* Engine alive and kickin' March 2nd, '06 
* RA-IV 'spec' 400 (.060-over = 410ci), balanced, Comp Cams #9794041, #16 heads (72cc converted to large valve) with 1.65 Harland Sharp Rollers
* QuadraJet #7042210, HEI, Hurst V-Gate, FlowTech Headers, X-Pipe with dumps, Flowmasters, TH-350, 3.90 Posi
* Best ET: 14.06 - Bandimere Speedway, CO. @ 5,800+'
Last edited by tremo; 10-31-2023 at 02:20 PM.
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