I second what Britcon said... talk to 3B...
What Britcon didn't tell you is that Bobb has quite a few of these old Maple Leaf trucks in his shop... not sure how many he owns but I'd guess at least 1/2 dozen (at last count he had around 100 old GM trucks stored) and as Bruce says is super knowledgable... he's forgotten more than most "experts" know and if anyone can tell you what you want to know he can... he's a walking enclopedia on these things!
Best of luck on your project!
~Trev
