How could i make my engine better?

[markss28]

Best thing that I have seen in cleaning up an engine bay is with the wiring. Take some of the stuff you dont need out and plug it or rap it with some braided lines. Take a scuff pad and polish everything that can be. Take some degreaser and start spraying. Maybe even buy some billet pulleys. I just bought some from Billet specialties and they were alot cheaper then March's.

[Speedster]

If you are taking it out anyway, I would update the cam. Talk with a Comp Cams, Crane, Lunati cam tech. A 406 can tame a hefty cam and that will bring out the power. If not that, consider changing your rocker arms to a 1.6 ratio for the extra lift and a few more degrees of duration. (Assuming your springs can handle it) But before that, make sure that the engine is balanced properly or there is not damage to the harmonic balancer. What flywheel/flexplate do you have. Internally or externally balanced ?

What coil are you running ? Plenty of spark energy ?

Rearend ratio ? Transmission/gear ratios ?

Any excess weight in the car you can get rid of ?

Just a few things to think about.

[Turbo Deuce]

Simple green is your best friend!
I assume you are pulling the engine. If so, clean the engine bay good and rattle can some gm satin black on it. Then if you change cams have the intake cleaned and clear powder coat it. Sand or media blast your headers and paint them with header paint.

Then when you install the engine take a day and plan your wiring to hide it or run it to where there are few wires showing. Buy the plug wire pieces to make them neat and route then under the headers if you can.

Run those trans lines under the engine to the radiator. Run the alternator wires between the intake and valve cover.

Vibration usually comes from the driveshaft. Make sure it is balanced and the yoke is far enough in the trans.

I am assuming that since it is a 400 the engine was internally balanced