Gpm caster block fit on Ext flm a-arms on Stampede?

I'm suppose to be recieving my whole flm pede tommorrow and wanted to prepare. Will gpm caster block and steering block fit right on the ext. a-arm kit? I also ordered the caster block from here also. Will the gpm steering block fit on the flm caster block? I know for sure that the flm caster block will fit on the ext. a arms.

flm caster block + gpm steering block = direct fit on ext. a arms?

gpm caster block +gpm steering block = direct fit on ext. a arms?

I really really hope i dont Have to buy the nitro parts...i like 100 miles away from a hobby shop and dont want to have to order morrrreeeee stuff for this project. This project has been going on almost a month. My mamba max wants to ride this flm pede already!

I am pretty sure that any one of those combos will work.But something will probably be drilled and you might need diff. cambers and steering turnbuckles.

i put FLM castor w/RPM carrier and stock arms.I had to drill the hole for the pin that holds the castor to the arm and drill the RPM carrier for the for the FLM pin also.I also had to get longer cambers and steering turnbuckles.I definately should have went with another brand castor for this setup.FLM says it fit the EPede,But not without a few mods.