rebulid 305 or swap 355
01-03-2006, 11:04 AM
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Car: 1985 Z-28 2003 chevy Silverado Z71
Engine: was 305 LG4 now 355 HO
Transmission: TH700r4
Axle/Gears: posi 373
rebulid 305 or swap 355
I have a 1985 Z-28 with a LG4 305 runs good 168,000 miles on it burns alittle oil nothing major should i rebuild it maybe with a new cam headers? I got a guy with a bulit 355 with 3,800 miles on it sell for 1,000 bucks what do u guys think?
01-03-2006, 12:24 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Have you replaced the valve seals? If not, that's probably where your oil consumption is coming from. Could also be intake manifold gaskets.
If you rebuild the 305, I wouldn't recommend going beyond standard size rings & bearings. If you have to do any machine work to the block or crank, you might as well go with the 350.
If you rebuild the 305, I wouldn't recommend going beyond standard size rings & bearings. If you have to do any machine work to the block or crank, you might as well go with the 350.
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