Simply I'm wonder if I can fit my j35 long block in a 98 civic dx.

 

sure. along with custom fabrication, you can make anything fit.

 

Hooviesgarage on Youtube just installed a V8 into a Porsche 911.
with Money and time, ANYTHING is possible.

 

Someone put a J in a s2000 so yeah sure

 

Aamir, you can do anything if you put your mind to it!

 

LS1 or Bust!

 

Yeah but the J35 is pennies compared to the LS and the J's loves boost!

 

we werent actually serious.
when some one starts a thread like this, you bet your bottom dollar the idea never left the ground.
Not to take away from the OP, just sayin...."if you have to ask..."
he would be better off taking his shell to a shop and spending the dough to get the shop to install whatever he may need.
Because that's what I would do if I didnt have the skill set to fabricate metal and swap motors.