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Old 09-27-2010, 01:50 PM
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Rebuilding a GM SBC 350 V8 MY 86. Tell me what is a must

Dear All,

I am currently rebuilding a Small block v8 out of a chevy g20 VAN.
I like to know what is a must on these engine to improve.

But I like to stay with a OEM character and not blow it up above 250HP.
I have to convert it to marine usage and like to have good low torque and nice gas mileage.

Hottrodders I hope you can keep an eye on my project.

Thank for the support in advanced.

Regards
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Old 09-27-2010, 02:06 PM
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Sounds like a basic stock rebuild will do. 250 hp is pretty much stock. Tear the engine completely down, take it to the machine shop and have them look over everything. They'll tell you what needs to be replaced, machined, etc.

A good upgrade would be to go with a retro-fit roller camshaft for reliability.
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Old 09-27-2010, 02:15 PM
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It might be a 305, rather than a 350. Post the casting number on the back of the block where the bellhousing bolts up, driver's side. (Can be seen from the top).
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Old 09-28-2010, 11:26 AM
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My casting no is 10054727
Made in Canada. The RPO should be L05.
Please correct me if I am wrong.

Need a complete overhaul gasket set, rod bearing, main bearings, camshaft bearings, rings.
Is is already a center of bolt valve cover!

Who has the best quality and great prices.
Ebay?

BR
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Old 09-28-2010, 12:09 PM
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86 & up, 2 or 4 bolt, 1 piece rear main seal. I'm guessing you already know that by now.

Summit has some quality / affordable rebuild kits. They come with or without pistons.

http://www.summitracing.com/search/P...ebuild+kit+350


They also make some camshaft kits with lifters.

http://www.summitracing.com/search/P...ummit+camshaft


I have a few Summit house brand parts (carb, RPM intake, lifters, water pump, pulleys...) and they've worked well.

You'll need to know piston and bearing size for the rebuild kit. Did you plan to have a machine shop check out what you have? I would at least have the crank ground .010 undersize and possibly have the bores enlarged .030 over, assuming it's a virgin block, just to clean things up.
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Old 09-28-2010, 12:09 PM
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To be honest you'd be money ahead to just buy a running low miles 350. They are pretty cheap- cheaper than machine work on what you have.
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