Here is the cluster I am building for my 1966 520. It has a NOS OEM speedometer in it. Still need to replace both temp and fuel gauges with NOS OEM gauges and install LED lights.
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Posted 13 November 2016 - 02:09 PM
This is a deluxe 411 instrument cluster with the chrome trim that Charlie put in his 520, the 520 had amber turn signal indicators, otherwise it looks exactly like a 521 instrument cluster with the green turn signal indicators like you have, the 520 and 521 clusters are interchangeable, the 411 cluster has to have the 520/521 mount hardware installed on it to mount it in a 520/521.
Posted 13 November 2016 - 06:18 PM
The black and chrome plastic is from the deluxe 411 as Wayno stated.
I did a L20B automatic swap in my 66 520 and I am using a 1980 720 wiring harness modified to work with the 520 lights and gauges.
Back side of my 520 instrument cluster modded to work with the 1980 720 wiring harness.
Posted 14 November 2016 - 07:32 AM
I'm pretty sure the smallest Wilwood master is a 1" bore. Too big for those manual Datsun brakes. You won't have any leverage.
Use a stock 510 master for good pedal feel.
Posted 14 November 2016 - 10:47 AM
Posted 14 November 2016 - 11:15 PM
The smaller the master, the more leverage you have which means more pedal feel. This can work against you though if the master bore is too small, you will bottom the pedal on the floor before the brakes lock up.
I would try the 510 master first. A 280Z master was designed to be used with a power brake booster while the 510's had manual brakes. A lot of people prefer the firmer pedal in a go-fast car, but in the truck, I think you'd probably be happier with the smaller bore.
Any 68-73 510 master should work. You may have to grind out the hole in the firewall a 1/16" or so, but no big deal, right?
Posted 17 November 2016 - 08:17 AM
Posted 17 November 2016 - 09:24 AM
Posted 17 November 2016 - 09:55 AM
Are you actually going to run those pistons in a street driven vehicle? Have you done any engine math to figure out the compression ratio?
I would also massage the tops of the pistons to A- make sure they fit in the combustion chamber, and B- to knock off the sharp edges which inhibit flow and can cause detonation.
Posted 17 November 2016 - 11:28 AM