So are we all agreed that we cannot get the original black wall tires.
That the only option for me would be the Coker reproduction Firestone Wide ovals?
Would not put it that way You have options. A few thoughts and possibilities
- First the wide ovals may cause clearance problems. They did in 67 for the Mustang
-Is it better to have the "correct" supplier or the size if compromise is what you end up with?
Ideas for others to comment on and you to consider
1- U.S. Royal Tires | Redline - are available in 6.95 x 14. You would have to cover the red line and possible mount that side in So right size - wrong maker
2- BF Goodrich Bias Ply Tires | Blackwall are available in an optional factory size So optional size different maker
3- And as you mentioned you could use the optional white sidewall Firestone wide oval tire So optional size and not a black wall like your came with. Might be able to use the smaller (stripe) red stripe wide oval and rotate that side inward after covering the red over. Goodrich or US Royal though both use the pie edges
Many years ago (read haven't tried this for a long time) you were able to get Firestone tires still out of New Zealand. Not sure if they were selling them as trailer tires or how they were labels, but they were the old style, or at least the ones I purchased, with the pie pan edge. Not sure if they had the right style of side wall and tread for a 67 -68
Just thinking out loud