How to make my Muscle car and sport chassis:



Place an axle, Make sure it is the 4 wide axle, the universal width for any accurately sized car.
Add your wheels on either side, If you want a regular car with, lets say 15inch rims use the normal road tires not race, I say usually 17 inch and above.



Add 12 long frames (WITH STUDS, so it looks like a frame)
Make sure to make all the "Frame" pieces steel so it adds rigidity and weight to the bottom of the car lowering the CG


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Duplicate the axles and wheels onto the last stud onto the 12 long frames. If this isnt long enough for you push the rear axles 1 over the frames. It will not compromise stability and is long enough for something like a 1970 Dodge Super Bee, which is a very, very large car.



Add the 4x2 studded frames onto the axles, below them on both rear and font axles. This will allow placement for the redirectors which will come on shortly to allow for the body to be placed onto the frame.



Add the circular redircetors onto the previously placed frames making them not clip with the axles.



Add 5 wide scalable pieces onto the redirectors as the base for the body.



Add two wide scalable pieces onto the previously places 5 wide pieces giving the full attachment to the body.



From there (If its got a curved bottom) add some rounded pieces maybe 4 long if you want that.



From there turn those pieces plastic so it doesnt have the steel texture as the frame.
From that add what you want to the newly made frame. This is a different way to make a frame. A sports car frame with a thinner body and good looking fender-flares will need a different body style which is a bit more difficuilt. I might do that tutorial some other day.

This method can be applied to making an extruding bumper or just to add a painted piece that doesn't clip with other parts.
Please note I will be using the word extruding a lot, for this purpose it means to make something "pop out" of the car body and to shift it every so slightly away from the piece that you want to cover up with the newly "popped out" piece. If that makes any sense. I invite you to leave if you have no clue what I'm on about. I strangely reccomend hand gestures to yourself to get a better idea of what im saying in caps like if i say BEHIND IT place your hands in front of you before hand and move them away from yourself, pretending the second gestures ending place is the piece that will NOT be extruded and painted, it helps me alright, leave me alone.



Lets start with a block. Lets say this block will be the piece which DIRECTLY attaches to the extruding brick and will need to also be painted differently than everything else BEHIND IT.



These bricks will be the part that allows the connection of the the painted piece that you want extruding away from the body. attach the redirector to the BACK of the brick pretending that the 1st pictures brick's side closest to the camera is the FRONT brick.



Get a scalable 2 long piece and attach it to the 2 thick scalable piece that was previously attached to the redirector and is now through the brick. This piece along with the previous bricks WILL BE the painted parts that extrude out of the body.



Place a 2 long scalable cylinder on top of the scalable brick that was previously placed at the start. ANGLE THIS BRICK at least 1 turn toward the back of the brick. The furthest attachment point of the 2 long cylinder will be the point of which the NON extruded body will attach to. The angle of 1 degree will shift the brick toward the camera slightly, just enough to allow an extrusion.



Add a scalable brick here if you need an extra attachment point to the body if simply the cylinder wont cut it.



This is the wheel well of my 1982 Chevrolet Camaro and its extruded painted piece to mimic the Camaro's paint style. As you see the extruded brick we have created so far will bust into the clean wheel well of the front right tire which is ugly and will make the suspension glitch which is not great.



As you see the extruded piece we have made so far is not connecting to the body via the scalable brick as it is yellow. Remove this as it is a waste of brick so far. The extruded set of pieces is attaching to the previously extruded pieces of the Camaro's paint style making a doubly extruded part, ignore this for the tutorial. Anyhow it is working and we can paint the white part any colour and it wont clip into other bricks.



Also remove the 2 long cylinder we placed a while ago. Do not worry the extruded piece will still attach to the body as a 1 degree extruded piece will always attach to a non extruded brick slightly behind the extruded piece. So don't worry if there doesn't appear to be a "clean connection" it will work.



So I leave you there with my tutorial I hope you've learnt something from this. I could add on to this at a later date.