Play safe with the rectifier.
The common 35A bridges are single phase and it is a bit of a guess what their rating is when connected 3 phase as done here with 3 bridges.
As single phase units they are virtually incapable of the 35A, it is a resistive or inductive load rating and can only be obtained with a monster heat sink. Even the connectors are on the limit at 35A.
If you can find them 3 phase bridges are more convenient but the decent industrial ones tend to be expensive although they often crop up surplus on ebay and similar places. I would look for something of 50A minimum for a block 3 phase bridge. Voltage rating is not normally an issue, the industrial ones will always be over 400v .
In many ways I prefer to build bridges from individual diodes, it is more work and involves more metalwork but that should be no problem to you. If you find individual diodes of 40A plus rating and 400v plus you will find it easiest to use 3 anode stud and 3 cathode stud. You need two insulated heat sinks and the 3 like diodes go on one sink and the sink is the dc connection. The ac connection is the link between the diode tails or tabs.
These units seem to need a lot less heatsinking than the common single phase bridges.
If cost is a factor the cheapest option seems to be individual press fit diodes. These are pressed into holes in the heat sinks which can be thick aluminium sheet. They are very cheap compared to screw mount diodes and are often found in low cost welders. They need careful fitting and work best in punched holes, the fit is a bit critical but you should manage that although I wouldn't recommend them to someone with limited metal working experience.
Flux
