Originally Posted by
Dave Severson
For street use, the 2V heads work fine, the port size on the 4V and the majority of the aftermarket heads need the engine to be turning some fairly high rpm to work right. Normal street use makes all the extra flow of the big ports unnecessary.
The 2V heads with a bit of match porting an inch or so down the runners, along with a multi-angle valve job and the right cam (call the tech's at Comp or other cam companies for their advice) and the Clevor engines are excellent performers.... If I were building a Clevor today, it would be either the stock heads or the new design Trick Flow heads.