236/238 601 605 113 is this to big for a 5.3 ? I want a temp motor while i build my 347 d1.

 

Yes, too big for a 5.3 with stock heads.

 

iv looked at a cam similar to this one i also have a 5.3. what if the 5.3 heads were milled and some port work and a bigger intake valve? or could we use a different head and still use the bottom end of a 5.3?

 

Wat if i used my 853 heads?

 

What if you looked at another cam? Vengeance has others more tailored to that motor.

 

Motors only temp an i was just gonna drive for 2months with it

 

That cam is going to be very lazy down low on a 5.3 and would want to be revved to 7k+...definitely better choices out there, like our V2 which would compliment a set of ported heads and work with the confines of the plastic intake's power band.