I'm having trouble sourcing a rebuilt factory carby to suit a Sierra... i've called up every listed suzuki wreckers in Australia and nobody can help me, not even for a 2nd hand unit needing a rebuild. Apparently any available carby won't even last a day on the shelf.
Sick of my rough idle, I now gotta suss out alternate options. Considering I live in Australia, not the US - primary concerns are reliability, efficiency, cost, and parts availability. Oh yeah, 4/5 of my driving is suburban commuting, while the other 1/5 is light off-roading (beach, bush trails).... so any conversion must suit accordingly to MY needs, not the needs of a heavy-duty off-road bush-bashing specialist.
(1) I'm wondering how hard it is to rebuild the stock unit myself? I've rebuild a 350 Holley and a Stromberg carb in the past, but the stock unit seems way more complex than my previous rebuild efforts.... maybe best left to a pro, or could a competent backshed mechanic knock this one over?
(2) Weber carbs - are they an efficiency improvement over stock carby's? How bad is the uphill stalling? Does this affect all driving styles or just extreme 4x4'ers who regularly put their car's over seriously steep terrain?
(3) 44mm Screaming Eagle conversion - to me this is the best option... BUT - is the change-over kit available from Zooks Off Road a 100% comprehensive swap? I don't want to buy only to find out i'll need to swap parts X and Y, replace the mains jet and on the carb, etc... ALso - how good is this conversion on the highway where I do most of my driving? Wondering about long-term reliability of this conversion too... can anyone comment?
I don't want any multiple carb setups, I wanna keep it simple and efficient, and ultimately - reliable. And EFI isn't an option either - too expensive for my wallet.
Can anyone offer their two cents to my problem?