How can I integrate the body

[Mans]

I designed this car body but with using " surface from network", but I had to make the rear and front of the body separately. This created a difference of cells size that is seen in the picture. How can I do a method that the rear and front of the object find the same shape of the main body. I mean, the difference of the cells disappear ( I don't mean using boolean or join)





Thank you beforehand

 

[Mans]

This is a rendered view of the object