nothing. but the intake will be diff.
As long as the 350 is older then a 1987, you will have no problems. They will bolt right on with no modifying.
65 lb/ft. There is also a sequence to follow. I suggest you take a look at this: http://www.boxwrench.net/specs/chevy_sb.htm
Torque for the dome???????????????????????? What the heck is a dome?????????
Yes it will work the block bolt patteren never changes from 350 to 350. You might run into a problem with a intake manifold not going on though unless you have it too for the heads you want to use.
Most definitely they must be torqued correctly. Torque in a cris-cross pattern slowly reaching the torque setting. For all specs click the link.
Answer The 86 Chevy block and the 87 Chevy block are the exact same block, nothing changed, it will fit perfectly.yes
Only if you have never started it.
Not being torqued in the right sequence when the engine was serviced.
No. The 350 has bigger valves. While you CAN put the 305 heads on the 350, (I can't imagine why you would actually want to) you can NOT put the 350 heads on the 305. Because of the 305's small bore, the valves on the 350 heads will hit the cylinder block.
no you cannot they are not interchangeable the 89 heads are fuel injected heads and the 79 are carb heads and will not interchange
Not a good idea. 350 heads will lower compression to 7 to 1 or less.