Nice cam for my 273?

The Isky E4 has been recommended by many for the 273.
All I know is what I've read/learned from the wise guys here, Those cams like Comp Thumper take away from low end . You already have a bit of low end issue in that single plane intake. The cast iron dual plane from a 318 would be a improvement. It will work well with the stock exhaust manifolds too. If you step up to the Edelbrock performer intake, exhaust manifolds still aren't really an issue but ... if you ever did upgrade the exhaust you will already have the intake. Just points to ponder.