I have an 85 s-10 blazer ( Tahoe package) 2.5L 4 cyl 5 speed. It's all stock and runs ok but I'm slowly working on everything with hopes of eventually having a slick little hunting rig in the future. I would like to know if there is any options out there for a carb swap like maybe an Holley 2 barrel. If there is what do I need to get. I may have a Holley 390 carb but what other components will I need and what would this do for performance and fuel mileage. If maybe just a rebuild would be sufficient where is the best place to get a rebuild kit? I'm open to all suggestions to makin this thing perform a little better. Thanks in advance!

 

TYPO! I meant to say I have a Holley 2bbl not a 390, I don't want anything 4 bbl. thanks!

 

I had a 2.8L 1985 s10 and there were too many vacuum lines from the california emissions stuff and I found out that I was able to put a weber 38 DGES and ran good till rings went. And i'm going to put it on a 1985 s10 blazer 4x4 too. Less vacuum lines to deal with too.Just my 2 cents though I try and help.