Reply to "4.6 advantages or disadvantages?"

The Cammer motors don't fit well in the Pantera chassis. They are very wide. Mark DeCasien, a Jersey Panteras member tried this and switched to a Ford 392 Windsor Crate motor.

I think he found that there were just way too many fitment issues.

Steve Wilkinson has a California Smog Legal conversion for the Pantera with a Mod motor, but it is very big dollars and the performance is limited I believe.

I chose have chosen to go a third route: A 9.5, 427 cubic inch Clevor. The block is Dart's 9.5 deck sportsman block and rated for a maximum of 1200 HP. The heads are CHI 3v aluminum Cleveland heads, the 218 intake runner version.
The builder, McKeown Motorsport Engineering, in Maryland, thinks the build will come in around 625-650 HP.

The builder has selected a Jesel mechanical roller valve train, with shaft rockers. They say it should be stable up to 7200-7500 rpm. The motor will be cammed to make peak power around 6500-6800 rpm. They also said the torque should be 400 ft/lbs plus from 2500-6500 rpms.

A package like this will set you back about $18K