The Pioneer QX-949 is a quad receiver, which means it has a LOT more parts in it than a typical vintage stereo receiver. This kit includes a total of 319 parts, which is more than any other kit I sell. This will be a long, slow rebuild. The parts for each board are individually bagged for ease of installation, and the instructions will tell you how the transistors go in and will make it easy to figure out which diodes go where, but there are a LOT of parts to replace here, so if you do not have a lot of experience with vintage gear I would not recommend starting with this one. You should know what you're doing and have a decent soldering iron, a desoldering gun such as a Hakko FR-301, heat-sink compound, and a dim-bulb tester with 100W incandescent bulb.
I have rebuilt several QX-747s, which are almost the same thing as this, and I rebuilt a QX-9900 as well. It's not that hard, just very tedious.