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Reply to "1974 front and rear brake rotors"

Yes, but the slightly larger rear rotors will still bolt onto the front hubs- the OD & thickness are within tolerance.  A larger OD front rotor doesn't improve braking unless you shift the front calipers outboard so as to use the extra rotor OD. You'll need some kind of stepped adapter or weld up the current threaded caliper mount holes & redrill/retap.  And since doing this only produces about a 5.3% increase in leverage (297/282), most owners probably wouldn't notice.

In any case, if you can currently lock up the front brakes, you don't really need bigger brakes, you need more tire surface to increase traction. All big brakes will do in that case is increase fade resistance in multiple hard stops- e.g, racing. For significantly bigger rotors, you'll also need bigger wheels & tires- maybe with fender flares, with larger springs & also adjustable damping shocks, to control the bigger, heavier front end parts. It all rapidly gets expensive.

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