[diablopony]

I have the M-6007-XE3 FR long block and I'm now very pleased with it. I hate to say it, but it took me a year to get it dialed in correctly. However, once I degreed the cam in right, fixed a nagging vaccum leak and dyno tuned the carb and timing, it really runs great.

The things I was able to keep were:
· Oil pan
· Oil pump
· Timing cover
· Fuel eccentric
· Fuel pump

The thing I had to change:
· Flex plate
· Balancer
· Distributor MSD (my stock one with Petronics was not cutting it)
· Intake manifold Performer RPM (the performer did not match up with the X303 heads)
· Roller rockers (works best with a roller cam)
· Valve covers (to fit rockers)
· Holley 670cfm carburetor (600cmf Edelbrock was not cutting it)

This is off the top of my head. I’m sure I left off many other misc. items. If you have specifics, I can let you know what I ended up doing.