Fired it last night, but finished some final plumbing at 0630 this am, so I could take Old Red out for a drive before work.
First off, it fires off easily w/o a choke ( have Mark's race Qjet on it temporarily).
Second, backing out of my driveway, up an incline, was always a "clutch feathering" challenge with the old 427. Ha! The MJ 467 thinks its a friggin Duramax. No bucking, no issue, hardly any throttle opening. 600 ft lbs will do that.
Dont ask about performance after 10 minutes of cruising ( still have to "metal mate" the clutch with some miles first), but what I can say is, the firing of the beast was completely drama free. ( well OK the new drop base wont fit Mark's Qjet, my white headers are now "blems", had to rig a coat hanger for throttle as I had nothing to fit the ball on the carb, I nearly burned the new speedo cable through - again, etc - all user issues, not build issues. )
Sounds and feels quite different from the 427, even thru the same 2" Hookers and 3.5/3" exhaust. Sure, i've limited it to 6500 rpms ( until I get a 6400 or 6300 chip), so it wont be a spinner, but the low end is measurably different. I'd rather have the TQ than the ability to pull the stick at 7200 rpms, which was the whole point of the upgrade.
Additionally, the 2.98:1 1st gear of the M23Z and the 3.31 CF code axles are plenty of gear for this beast. That was evident immediately. Idle is still high as the carb is still in Colorado mode ( 1200 rpms or so ) Very keen to see vacuum at 950 rpm idle. Suspect its all of 14" Hg. Also suspect the "baby cam" wont idle too rough, just like an old original muscle car ought be. Will set idle tonight work after timing it to 36 total, and correcting a small leak at the thermo housing ( crappy gasket's fault I believe). And then more "SEAT TIME"!
Ps, I've never seen an accelerator rod sticking out as high as it does on this race Qjet. Holy moly! Got pump shot? HECK YEAH!
Design goal met and exceeded! ( well, lets see if it'll propel Old Red to over 116 mph in the 1/4 or 90 mph in the 1/8. )
THANK YOU MARK!