i just replaced my 305 for a 355. I took the ac/smog pump unit off, what size belt will i need to run the other acceseries such as the water pump, alternator and power steering? Should i just get the ac delete pulley?

 

Seeing as how you have an 88 im not sure how you could get away with taking the whole a/c and smog pump unit off, i had the smog pump out and quite sure the parts stores carry one for it without the smog pump as for a/c im not sure if there is an idler but there probably is since there is one for the LT1 i put in mine, hope this helps.