I tried a search but didn't come up with an answer. It's my understanding that the '99 (?) and earlier LS1 engines had the coils mounted directly to the valve covers, while '00+ LS1 engines use coil mounting brackets which are then bolted to the valve covers. Does anyone know why this change was made?

The reason I ask is because I want to mount my LS1 coils on the sheet metal valve covers of my LT1 and need to know whether there's a good reason to buy the newer GM brackets, or if I can just mount the coils however I want by welding mounting posts to the top of the covers like the earlier LS1 covers had.

Thanks!

 

The thought switch was made in 99. Only 98 f-bodys have direct mounted coils as far as I know.
It was done to keep the coils cooler, to ground them better, and it's cheaper. Because the coils now come in as an assembly from a vendor.

 

The switch was made so that center bolt rocker covers
could be used. The design engineers say that the center
bolt on the cover provides more even pressure on the seal.

 

Thanks!

 

youve got my (our) interest, what are your doing with the lt1?