I think there is a certain amount of time you have to send some sort of letter disputing the debt. However, I would watch my wording and stick to the facts.
here is a ls2 thats setup for a carb.
http://www.gmperformanceparts.com/EngineShowcase/index.jsp?engId=LS364440&engine=LS%20364%20440&sku=17802134&engCat=ls
is rated at 440 CHP.
best bet since you have concert walls would be to frame it with 2x6s and 4x4 for the legs and have a 3/4 inch plywood top. it will be a bit over kill but you will be able to keep a engine on it if you have too.
you are correct, also like Vin said its a low to mid 14 sec truck which isn't that bad when you consider that.
A: its a truck
B: its weight is 5000 lbs
C: its a truck