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Huck · 11-06-2006, 08:40 AM

The one constant of a big block cab is the exhaust heat shield on the lower part of the firewall---passenger side. Hump size was transmission dependent to my knowledge. The other key as mentioned would be the power steering --assuming it had that--you would have a couple of extra holes on the upper inner drivers fender where the windshield washer tank would normally mount. This would be for the PS resevoir. If the heat shield is there, it was a big block.

11-06-2006, 08:40 AM	#17
Huck Senior Member Join Date: Jun 2001 Location: Shelbyville, KY Posts: 3,261	Re: Original Big Block Truck? The one constant of a big block cab is the exhaust heat shield on the lower part of the firewall---passenger side. Hump size was transmission dependent to my knowledge. The other key as mentioned would be the power steering --assuming it had that--you would have a couple of extra holes on the upper inner drivers fender where the windshield washer tank would normally mount. This would be for the PS resevoir. If the heat shield is there, it was a big block.