The headers would be the same anyway, so you can order headers for the 83 and be all set.
The old exhaust manifold will need to be removed. The new headers will either have to be made to fit the engine well, or the inner fenders will have to be modified to fit. Then the headers will need to be either mated to the old exhaust or a new exhaust system will need to be installed. In a v8 engine installation most people prefer a dual exhaust to maximize the headers capability.
What engine and car they were designed to fit.
block hugger headers
No.
yes
No.
no
No. The Pontiac headers will not bolt up to the Chevy small block.
Don't buy slip fit headers. If you are going to spend the money, spend it right. Slip fit will give you a big headache, no matter who installs them. They will leak like a sive and drive you crazy. I recommend that you get hooker headers.
Both types of engines will fit into your 1995 Ford Explorer. The engines are basically the same size and share the same motor mounts.
Yes if its stock no headers?