Anyone know the specs of a 70 270 HP Mexican 318?

Why did the Mexican 318s have more HP? What did they have for heads, & cam?

Found something in the For A bodies only website where someone posted some of the components that were used in Mexico for the 270 horsepower 318.

O.K. first off yes you read that right i said mexican superbees. i stumbled across these cars about 4 months ago. there is very little info on these cars or their excistance(sp). here is what i do know about them. these cars started being made in 1970 as 71 models. they were phased in to take place of the current mexican muscle car at the time the dart gts. first off these cars are not exactly like the us counterparts. they have alot of unique differences. they are hybrids if you will. you will see what i mean. production on these cars is was very low throught their life. only a few thousand (4-6) per year from what i have gathered. in 1970 the superbee was introduced for the 71 model year. it was by all standards a 1971 duster twister. there was some special striping. they used the dart 340 scoops on the hood. they made use of factory hood tach on just about every superbee made as well. the engine was a different story. the superbee used a high performance version of the 318. it was rated at 270 hp! it had the US 340 intake and thermoquad setup from a 1970 duster. it also used the US 340 cam. compression ratio? unknown. the 318 remained the hot setup for the first 4 years......... in these pics notice the hood scoops and their special badges. this car is factory striped.