I've never tried using a V6 Memcal for a V8 engine. I've done several '7427 conversions, all V8 engines and all had V8 Memcals.

dave w

I agree, a small patch would be a good option.

dave w

I think this is a good tread to post a budget update about converting a vehicle with the 1227747 / TH400 combination to a 16197427 PCM which does not have a TH400 Kick Down control.

On vehicles...

I think the knock sensor circuit re-wiring is confusing for a few reasons.

The original re-wiring information from Thridgen.org was for a passenger vehicle. The information on Thridgen.org...

The VSS information from JTR, http://www.jagsthatrun.com/SpeedSensors_Order.html shows early Pickup TBI ('7747 / ' 8747) is 2K PPM.

I've never tried to use the 4K PPM on a '427 PCM. The 4K PPM...

I've never measured the normal input to pin F13 from the VSSB. It seems to me, 2K is the expected input to pin F13 on the '427 PCM. I've only done the '427 PCM to vehicles that had either a '7747 /...

The '7747 is a 2K PPM VSS. The '427 is happy with a 2K PMM input to pin F13. The only time I needed 40 pulses / revolution was for an electronic overdrive transmission conversion.

dave w

On my '427 PCM schematics, A5 is Distributor Reference Low (Ground). I personally don't like the idea of grounding the P/N wire to Ground. On the '7747 to '427 PCM conversions I've done, I covered...