with the e85 side of things you'll def want to get flex fuel sensor so that at any moment there can be different mixtures of e85 / unleaded 98 and it'll auto adjust to run fine. get this sorted before your tune so you only have to do it once. not sure what area you're in but make sure your local tuner is comfortable to perform this tune on carberry rom on your stock ecu otherwise you need to travel bit further to find someone who is comfortable with that, or get the tuners ecu of choice which means factoring in more $$
for that aimed power level you're definitely gonna need bigger injectors. id 1050x for 98 and potentially id1300s for e85 (check with your tuner what he recommends, i'm not sure the limit of id1050 but it seemed to run just fine for me at 240ish wkw on 98 with plenty duty cycle left)
yes go top mount for sure. i got an hdi kit which fit in quite well, allowed me to keep the stock fog lights not that i really use them but i just like the way they look lol. more importantly it's of pretty high quality with super efficient core. you will have much less worries about heat soak when you start pushing high boost etc. with front mount also.
td05 will acheive your power but you should really consider the more modern turbo ranges. i know theres a bit of a price difference but modern turbochargers with their advanced technology will deliver better power levels more efficiently and more importantly the boost curve will be more sexier (as in you won't have near as much lag during daily driving scenarios)
you will need to change to an ethanol compatible fuel pump
depending on how much boost you will run, you may need new map sensor but check with your tuner. shouldnt need new maf sensor since will probably run speed density but again best said by the person tuning it.
recommend you to check some of the 'optional' mods also when you start pushing higher power levels, such as : oil cooler, oil catch can, split fuel rails
shopping list :
turbo
injectors
flex fuel sensor
fuel pump
ethanol compatible fuel lines to replace the factory rubber stuff. if you already have replaced with fuel lines make sure they are ethanol compatible
front mount kit w/piping
labour to install above
maybe map & maf sensors