.
but need to knock out some of the engine heat and reducing the road noise would make it more pleasant
would you consider some nicely positioned levers in the hood ??
inside cab, under hood and door sheet metal sound deadening is another consideration. Download PDF
(220k), not just the floor and fire wall
a couple strips of dynamat there also.
http://www.dynamat.com/products_architectural_dynamat_xtreme.html an employee of the local auto sound shop did his whole floor (and trunk) w/ dynamat and says he loves the no noise ride
HELL i would to if i could.......
heat temp max 300 degrees:::: the factory specs below

EASTWOOD has it 10% off now.
Appearance:
Black butyl core with 4 mil aluminum constraining
layer, self adhesive with release liner
Thickness:
0.067” (1.7mm)
Temperature Range (Optimal Performance):
14 oF to +140 oF (-10 oC to +60 oC)
Temperature Range (Resistance):
-65 oF to +300 oF (-54 oC to +149 oC)
Adhesive Peel Strength:
42.6 lb./in. (74.8 N/cm) on cold steel
Chemical Resistance:
Resistant to water and mineral oils
Specifications
Mass:
0.45lbs./ft.2 (2.20kg/m2)
Acoustic Loss Factor @ Temperature
(Using ASTM method E756 @ 200 Hz):
0.081 @ +14?F (-10?C)
0.240 @ +32?F (+0?C)
0.257 @ +50?F (+10?C)
0.417 @ +68?F (+20?C)
0.259 @ +86?F (+30?C)
0.194 @ +104?F (+40?C)
0.140 @ +122?F (+50?C)
0.094 @ +140?F (+60?C)