help with my stock floor bodydrop.

sup guys/gals. i have been tryin now for about a month to do a stock floor body drop. i need some help with a few things. im wondering on how for up i should run my tubing because the frame starts to bend and curve or if i should just put my tubin straight inside and dont worry about the fame. im workin on a 95 chevy s10. another thing im wondering is how far forward i should be cutting. im doin this all on my own i dont have any help so if anyone can give me anything that would be great.