Debating;
Replace Weind 256 blowers on my 575's with TBS or,
switch it all over to Whipple 3.3's.
Superchillers are 12 years old with 400 hours
IAC's, injectors, recirc pumps, fuel pumps, intakes and thermostat housings are 16 years old with 500 hours

Injectors have been randomly replaced with good used over the years
intakes were welded up before rotting through
IC's and engines have been flushed every time after salt

I like the idea of fixing as I go, cheaper and easier.
But, if the injectors go, and I can't find any, I'm done.
No room for Eddy's injector set up or Dyers Blowers.

If you go whipple, what ecm are you planning on running

I have dyno sheets from when the engines were done. I'd hand that off to Whipple to do the ECM's.

I know the Mercury 525 3.3 kits had MEFI 4B's.....the Holley HP would be a good choice......the low profile of the Whipple will fit in most applications without hatch mods

You have a few different directions you can go, I believe fuel injectors from a 454ss will work and can flow more fuel than the stockers. Another option is Eddie Youngs Fuel injection plate, which increases throttle body flow due to no pod in the way, also only increases height of setup by .2". For blowers you could go with the Dyers 871 kit and keep the old school roots look. Blower shop 250s are nice but for the $ Dyers kits are better bang for buck. With the bigger blowers chillers would not be necessary.

Best Street Strip Blower Kits and Blower Repair 471, 671, 871