I'm looking at having a mh casting rod built for larger 1/2 oz+ jerkbaits in a 6'3" length. I know I can have the blank cut to that length, but I've been looking at blanks that length already to make the process easier. I saw an mhx mag bass high mod in that length and power with an xf taper and also a mag bass xf that is half the price and says world class rod series on the blank. Are these blanks true to ratings and how's the sensitivity? Has anyone used either or both lines that can compare with other blanks or factory. Sensitivity isn't a huge issue with jerks, but I'd occasionally use it for baits to heavy to skip with spinning tackle. Would I be better off paying more and getting an scv or other premium blank or are these a better buy. Thanks for the help guys and any reviews or opinions are greatly appreciated

First I'd skip the high mod for jerkbaits,but that's just my opinion. They do fish relatively close to ratings. I'd go with the standard SJ783 if you want an extra fast blank, or the MB782 if you want more of a traditional fast action. The MB783 is too much blank for effectively working jerkbaits imo. The SJ783 is a pretty powerful, stout blank. The MB782 will be a little more forgiving. Just cut 3 inches off the blank. 3 inches will make no noticeable difference in how the blank performs or behaves. 

They already make a 752 and 753. They have a 753 mag bass taper that is listed as an xf taper with a lure range of 1/4-3/4 for around 90 bucks that is a high mod blank and a 753 mag bass xf with an xf taper that has a lure weight rating of 5/16-7/8 and a price around 60 bucks and it says world class on the blank. If I'm gonna pay the money to have it built I'm wondering if there is a big difference in sensitivity between these 2 blanks since the price difference isn't too great. 

How much power do you want and how fast of action do you desire? A higher modules blank is going to have stiffer characteristics. I wouldn't focus on a higher carbon rod for sensitivity purposes, rather a blank that has the right tip to effectively work a jerkbait as its designed to do. A blank that has a progressive bend and a fast tip. Yes, the high mod offers a little better sensitivity but it's not night and day. 

I'd use something from their popping blank line or a Rod geeks xs. Both have fast actions but a soft tip.  The Rod geeks blank is also a very good worm Rod.