The 352 has a standard cyl bore of 4.00" and a crank stroke of 3.50". In esscence that 352 block can be overbored to 4.05 (if it hasn't been already) which is the same bore as the 360 and 390 stock. Only difference being the 360 used the 352's 3.50" stroke crank and the 390 a longer stroke 3.78" crank. Same block, heads, intake etc.... can still be used. Down the road you can look for a 390 crank, rods and pistons. The 352 block can normally be overbored to 4.08 .030 without issue. Once you get past that you'd want to sonic map the walls for thickness. But there's nothing wrong with a good running 352. It's a very simple and well made engine once you learn some of the basics. The stock heads and intake will respond to a port match and run pretty darn well as is in stock trim. You can spend thousands on stroker kits, heads and intakes. But if all your looking for is a nice runner the 352 with a better cam and some headers will respond well. Easy way to remove the stock cast iron intake is with a engine hoist. As Dave said it's heavy. Save your back and let the tools do the work.