...I am leaning 275 but I worry about going too big with the cam. This is going to be a weekly driver. Maybe a few trips to the track in her life but almost exclusively a street car.
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Do you plan to commute daily back and forth to work in it every day???
Is it a car to have fun on weekends running errands, cruise-in's, car shows, etc. And maybe having fun going to store on weeknights after work???
The 273 rockers are about 1.46 ratio. Not 1.50 ratio. So that will reduce your lift slightly and take a slight edge off. Factoring the 1.46 ratio that might change your valve spring requirements.
I run a 275-Solid with 1.5 ratio rockers in a 416 stroker. The stroker sucks up cam. I have a single plane M-1 intake that takes away some streetability too... Pluses and minuses...
Run the 275HL with 273 rockers, full 2 1/2" exhausts all the way out back with Dynomax or other quiet muffler.
