I am building my own fuse block for my l92 engine installation. Right now the relays I have on hand are 50amps each. Will 50 amps be enough to handle the Run/Crank? Will 50 amps be enough to handle the Power/Train relay? I am using a modified factory harness.

 

Stock relays are rated ~30A, you're good to go.

 

That is good news. Thank You for the reply. I might add for discuission that the N/O side is 50amps and the N/C side is less something like 30 amps. I will be using the N/O side.

 

I think 50A would be enough. The stock relays are usually 30A, but I think GM used a couple of them for all the hot in run&start circuits.