crosswind air gap or stock 4bbl manifold

Thanks for your opinions and input. .. and sorry for my late reply

Time to give you an update / more info

Regarding the cam mentioned above... it's very very tame, as i found out in the meanwhile, it was supposed to be sold as a exchange cam for pick ups like W200 etc with 318 engines
So i will just swap that stick against a XE274H from compcams i have laying around

About the carb . Nope it's not a double bumper it has vac.secondaries. . It's a nice carb but it starts to get issues when it's really heated up

As i just purchased a 600cfm Holley squarebore unit, i will also switch the 4011 against that one.

The Chinese Crosswind is also allready laying around in my garage (bought that one to put it on a 318 magnum which is also stored in my garage, but couldn't manage to go on with this block at the moment, but maybe i should let the 273cui as it is, and work on the magnum instead. Even in stock trim with manifold and carb the magnum should make decent power)

Heads are gasket matched for 340 runnersize also ported etc

The question is now. .. just swapping intake cam and carb on the 273 and trying out whether it will work or not (guess iwill loose bottem end power with the XE274H )
Or going with the stock 318 magnum and simply bolt on intake and carb (and the stuff needed like water pump, oil pan etc)