From what I've been told (by someone who know a heck of a lot more about Internationals than I) is that Testors Red 1203 is an almost exact match for International Red.
Looks really nice. Kind of surprised to see a red engine under the hood with the gold Bulldog. Nice looking tanker-yanker. That's a lot of lemon juice!
Hard to say. Looks like the only engines available from the factory for the 1969-1970 model year for the L700 were Dodge gasoline engines:
http://www.olddodges.com/index1.htm
Knowing the Tommy Ivo truck, it's highly modified.
Looks awesome, Charles. Fantastic weathering job. What do the numbers (90, 80, 60) on the rear of the cab signify? I've seen these on European trucks, and I've always wondered.