The trigger wheel will have to be done by a machine shop.
Just remember put the crank pulley at TDC which is 2nd notch from left. Keep it at TDC and design where you want the VR sensor to go. It doesnt matter where you put it as long as the pulley is top dead center. After finding where you want the sensor to be take the trigger wheel and counting 9 teeth left from the center missing tooth thats where the VR sensor goes, so mark the trigger wheel and crank pulley.
Are you planning to keep P/S or A/C.
Anyways heres my write on MS.
zerothread/164446
As for using the OEM coolant sensor. This only works for Megasquirt II
zerothread?id=225343
Quote »Temp:~~~~~~~~~Resistance (Ohm)48.0F~~~~~~~~~471086.0F~~~~~~~~~2010170.0F~~~~~~~~330[/quote]Quote »Calibrate Thermistor Tables (MegaSquirt-II only) For each of the coolant (CLT) and intake air (IAT) temperature sensors, this utility lets you specify the resistance of the sensor at 3 different temperatures (along with a bias resistor value) which allows you to use non-standard temperature sensors (the defaults are for the standard GM sensors). It functions much like EasyTherm did for MegaSquirt-I.
IMPORTANT NOTE: Do NOT burn tables ('Calibrate AFR Table' or 'Calibrate Thermistor Tables') on a running engine. Even idle is NOT allowed, because these tables ONLY exist in flash, so once a table is erased, there is nothing but garbage in there until it is re-programmed, one word at a time. Until that reprogramming is complete, operating the engine is unsafe.
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