what do you guys think of Boyd Blasters 5 on a 67 chevelle. 17x9.5 275/40-17 rear and 17x8 225/45-17 front

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What you think of them is more important.

so does that mean you dont like'em

I don't even know what they look like but that's not the point. What is,do you like them? If so,that's all that needs to be said.
FWIW,I would run a 245 or 255 front tire.

I had better like them, i already bought the back wheels. just wanting to know what different people thought. what size tire is on the front of your elky? thats a nice looking ride you got

I'm running 275/40/17's on the front of my 69,,335's in the rear.
Thanks for the compliment. Post a photo of your 67 when you get the new rolling stock mounted,if possible.