Get the shroud. I put a shroud from a 1990 burb on a 79 blazer and had to do alot of trimming, but that was because the blazer had an aftermarke aluminum rad that was fabricated into it. I also used an 87 blazer shroud on a 79 with very minor trimming. with the shroud the fan will be concentrated on pulling air through the radiatior rather than from all directions.