What kind of gas mileage do you get and what transmission do you have?

 

I would also like to know this.

 

i have a scroggin crate 350 vortec (iron heads) tpi, would info on this help any?

 

i believe the fastburn 385 is a gm factory 383, not a 350

 

FYI... the 385 label is 385 hp and 385 torque on a 355 motor.

http://www.gmgoodwrench.com/crate_en...all_fast.shtml

also when matched w/ the HOT cam max HP is 425

 

All it really is, is the 350ci zz4 with fastburn aluminum heads. I know b/c i have it. And yes, some places claim 430hp, and 425hp with the addition of the LT4 hot cam and 1.6rr. If you were to do this, from experience, i would say to just buy the cam and roller rockers, not the whole kit for $500! The springs in the fastburn heads are the same as the ones in the kit, ( i wasted time and money if you were not paying attention!) lol Sorry, not running yet so i do not have any info for ya. Remeber, read the fine print b/c the hp #s are made by the addition of the parts listed in the fine print! FYI, I used the miniram instead of using my stock tpi. good luck