Ok....here we go AGAIN!!! Looking for a 340 CAMSHAFT
I have a Lunati VooDoo 702 cam in my car and it runs well. It has 19" of vacuum at idle if you have a brake booster.
Its a couple steps bigger than a 340 cam but it works great in a daily driver. Way more modern grind than an old 340 cam. Push the easy button and don't overthink it!