i understand what you said about heat soak, but as long as his thermostat is working, the temp "shouldn't" drop.. another valid point unless both cars were purchased from new and has roughly same mileage with similiar lubricants/change intervals then the use of 2 different cars may be a lil more va...
y we have to chage oil and plugs soon after? some of the chemical would leak down past the rings and contaminate the oil and some of the crud may stick on the plugs and would need cleaning or replacing don't spray the air flow element when hot, u would damage it, only clean when stone cold just avo...
rating or type
those in stock form, generally carry H4 type
as for rating, again from factory, the wattage was 60/55 and with bigger wattage bulbs, they burn the OE sockets
drain and refill with fresh oil of a thinner body and run that for a lil while and drain him so as to clean up the inside
then refill with what u like to use, should be ok
for a 50hp shot, just plugs to one step colder for 75hp, just plugs again the above is for wet systems for dry, then u would need same colder plugs as above and also a higher vol pump for 75hp for all abovei have a nice kit for sale u would need to retard timing from anywhere from 1 deg to 3deg
^^^with all other bolts such as Intake, cams, exhaust and so forth
think less if those are not present
exhaust is breathing and if nothing was done to the engine u r not gonna get those numbers
