yes they will bolt right on.
A bare 283 Chevy engine block with no heads or rotating assembly, aprox 150 lbs.
Chevrolet did not build the 283 in 1968. The 1967 Chevy 283 had from 195-315 hp depending on how it was set up.
They will fit, but the engine won't perform very efficiently. Also, 283's didn't have accessory bolt holes on the ends.
Yes, they should fit ok. 305 heads should bump up the compression a little.
The 350 engine was introduced in 1968. A 1955 small block would be a 265 or 283.
YES, If you have center dump exhaust manifolds you will want to make sure that they will bolt up to the 350 heads. You did not say what year heads you are going to use. BUT more the likely they will bolt up.
A 283 doesn't have a harmonic balancer, so that's a quick way to tell right away. Also, 283's don't have accessory bolt holes on the ends of the heads. The valve covers on a 283 don't have a filler cap. Oil is added through a long tube sticking out of the intake manifold.
4" bore, 3" stroke My 301: High-nickel content 283 (1963 Impala) block bored to 4" 283 crank (3" stroke) 302 dome-top pistons and "pink" rods 291 Camel-hump heads (unported) Pretty much 302 parts with a 283 crank/block
yes all sbc manifolds will fit, when you get to cyl heads then you will have trouble since most aftermarket are for 350 bore which is larger
A typical small block Chevy weighs about 500 fully dressed. A 283 may be slightly lighter, but I'd bet it's every bit of 450. Especially if it still has the stock iron heads and crank.
No, 283 has too small a bore. The old power pack heads that came on some 283's were 202,160's, so I would think the 305 heads should work just fine. Not sure about the resulting compression ratio though. The 305 intake might be aluminum, which would be lighter than the 283 intake.
67ci