The Explorer heater control valve assembly appears to be compatible with the DOHC heads after a little minor bending of the support bracket. I may need to find a different hose to connect the valve assembly to the firewall inlet tube. I cleaned up the Explorer spacer plate a little and then positioned it. The flexplate has a label on one side marked engine side. Care must be exercised when installing the flexplate bolts since the mounting holes are only a few thousands larger than the bolts. First I test fit bolts into all of the holes without the flexplate in position. Then I removed all of the bolts and positioned the flexplate on the crankshaft flange holding in position with one hand while starting a bolt at the top with my other hand screwing the bolt in just enough to keep the flexplate from slipping off of the flange. Then I attempted to start bolts in each of the remaining 7 holes. One bolt didn't want to start due to binding even though I could rotate the flexplate a degree or so in either direction. So I removed all of the bolts and rotated the flexplate one hole position. Once I was able to start all of the bolts I removed one of them, applied thread lock to the bolt threads, ARP lubricant to the bolt face and then screwed that bolt in until the face was about 1/8 inch from the flexplate. I repeated the process with the remaining 7 bolts. Then I hand tightened all of the bolts and used a 0.001 inch feeler gauge to make there was no clearance between the bolt face and the flexplate indicating the bolt had bottomed out. Then I tightened the bolts in a cris/cross pattern at 15 lb-ft intervals until 60 lb-ft and then to 70 lb-ft. The flexplate seems to fit fine on the crankshaft.