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This fresh engine is in our '69 X33D80 VIN#124379N658489. Heads are 186's dated Dec 1 '68 and Dec 2 '68.

Will consider swap out of block and heads for late May - early June (prior to 6/16 assembly) block and heads in similar condition.

Bear with me for a second:

I just replaced an off-brand distributor with an MSD 8360 Pro Billet (their ready-to-run version which does not require the box). In checking for voltage at the coil I found 12v at positive side of the coil with the ignition switch in RUN... and 9 volts at start...just the reverse of what should be in place for a points-style original distributor. The MSD needs 12v at RUN.

I haven't pulled the harness nor separated the wiring (yellow and wrapped white?) yet and am wondering how the previous owner could have wired this thing backwards.

As I intend to install an original 480 distributor in the very near future resolving this issue is important.

paul

I am at a loss as to why the PO of this car ran 3/8" inlets...but he did. Am still trying to figure out which application has a 3/8" Yblock.



paul

To be "correct" I guess I should step down the lines from the Y block....Nah, I'll keep the 3/8".

paul

Our Holley 4053 repro carb showed up yesterday: jetted 68 primary; 76 secondary; 6.5PV primary; 8.5PV secondary. I haven't opened up the secondary vacuum can to check the spring. I did find that the inlets are for 5/16" lines and fittings. I switched out the 3/8" inlets from the current Street Avenger. Were the original fuel lines 5/16"?

Thanks

paul

I'm at sea level. Current Street Avenger Holley has a 6.5PV on primary with 70's; 78's on secondaries. Plugs clean and milk chocolate.

What would you suggest be the starting points with the 4053?

Stock Z intake; stock exhaust manifolds; chambered exhaust; cold lash at .026; 16* initial 36*total at 2200; 19*vacuum; RJ127C's at .040. Stock 11-1 and std. bore (to my knowledge).

paul

Is that PV absolutely necessary or have others plugged it?

Wasn't Bill Thomas one of the early vendors who supplied the Z28's headers to GM?

It appears that the valve covers have been swapped from side to side....to clear the intake it would seem.

They resemble slightly the GMPP covers on my old '56:



paul