hi guys hows it goin,would anyone know the correct screw size for the voltage regulator and resistor fitted to the firewall of a '68 charger rt,think someone must have forced larger screws/bolts in at onetime.
circled holes shown in pics,thanks again guys. :2thumbs:
head is 3/8 as far I recall
plated 1/4” anchor-headed screws
https://www.ebay.com/itm/Mopar-ECU-Electronic-Control-Unit-Mounting-Bracket-NEW-/401766543038
ECU uses same than resistor and regulator
just the info i need,cheers guys,stay safe :woohoo:
Im not 100% convinced ALL the 68 and older cars were a 7/16" hex size bolt with a free spinning captive washer
I pulled a bunch off a 1968 coronet a few years ago and they were all 1/4-20 thread pitch but a smaller 3/8" hex with a flat washer molded in the head
head markings themselves will vary plant to plant , year to year and model to model.
some were a N, some AF, some a series of circles
ah so they are supposed to be 1/4" 20 unc i presume,if so these holes are now to big,will have to get a couple of correct size nuts and weld those to the back of the firewall
would this be a good idea?? :scratchchin:
cheers guys :cheers:
Quote from: westcoastdodge on May 15, 2020, 07:23:02 AM
ah so they are supposed to be 1/4" 20 unc
Yes,
If you can get to the back side of the firewall with a dolly you can use a small hammer and flatten the metal out to regain the correct diameter.
or take a welder and tack a small portion of the hole closed
once the metal is bent if you hammer it from back will back to its position but is already weak so will go back easilly.
on my 74 I opened slots on a side to insert U nuts and my ECU is attached to U nuts, but sure the area is flat.
cheers for the reply's guys,car is completely stripped so can get behind them no problem,will clean the enlarged holes up and weld the nuts on the back :2thumbs: :cheers: