Been running one over a year now. Only advice is plan on upgrading fuel lines (send and return). Trouble free if this is done. Mysterious "runs too rich" problems if this isn't done. Also, a bad exhaust gasket may cause problems (melt) the IAC and TPS at cylinder 3+4 on I-6. Plan ahead and it's fairly simple to install.
Oh yeah, if you're planning on switching your ignition system to a multispark CDI, you need a new tach filter later on. They send the filter to what you are currently running. Different ignitions have different Tach characteristics.
Spent the weekend undoing a stand alone HEI, and installing a TeamRushed motorcraft dizzy, with a MSD6 box, in a super cramped engine bay.
Imagine my joy upon discovering the MSD Tach signal is incompatible with the Tach Signal Filter needed to fire the fuel injection pulses as equipped on my Howell.
And the MSD Tach Splitter, and or Tach adapter is not the correct fix for this either.
Rant off.
Get the Howell,it's a great stand alone unit.
"Junkyard TBI" is a much cheaper route. TBI units are bulletproof. A junkyard one is most likely in great shape. A TBI rebuild kit is only sixty bucks. Tiny nozzle filters, and new gaskets included.
Or save some grief and get a combo TBI/remote-coil HEI where you have a knock sensor and computer controlled dizzy. Forget who makes it, but it was only a hundred dollars more than the Howell TBI, last year.
