Pantera 393ci V8 - Oil change pre or post powertuning?

[tch911]

I have a Ford Cleveland which was bored and stroked and completely rebuilt using new parts by Huddart Racing Engines, Crewe.

The engine has done around 600 miles of varied road miles and the engine has started to loosen up. The carbs are also now running a little off so my thoughts were to have the engine power-tuned on a rolling road with engine set-up genius Peter Lander of Sigma Engineering, Gillingham.

Any thoughts/tips/hints?

Should I be servicing the engine before or after the session. Or both?

Many thanks,

[tch911]

Thanks everyone, especially Peter's last post. Much appreciated, Tom