you are allowed 10% of wheel base, try not to go all the way,
also , make youre tunnel bigg enough so you dont have to get long ext and ratchets to get trans bolts out,
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also dont want to go back to far on the motor might have to get into the windshield ?
as for how high./low the motor get , depends on where the rear sits, and angle of trans, never want the trans to go uphill, 0 or 2% down (really dont like 0), this is dictated by what ride height or stance you want to achieve?
my motor is moved back 7" less than 10%, but my motor is as low as i can go without the trans up hill, and my oil pan,
i cut up my k memeber is all i use is the bars i have an open area except for the rack/pinion,
good luck
![](/ubbthreads/images/graemlins/thumbs.gif)