I'm planning on purchasing the MD Iso Thermal plenum Spacer soon but i know in the future i will also get the MREV if i install the spacer and in the future install the MREV will i need any additional parts ie: gaskets, or will i be able to take everything out switch the lower plenum and still put the spacer right back in???? or should i wait until i have both parts??

 

The MREV2 is made from your lower plenum that you already have. The MREV2 was made for us Rev-up folks. Some put this on the 287 motors and made gains over what they had, but there is that cost issue. If that's not a problem then it's really up to you. As for parts you can use the original gaskets again but they are pretty cheap to buy new. You'll get an Arimid gasket that you'll use for under the lower plenum. Other than that, to change out the lower plenum is no big deal. If you can do the spacer, the lower plenum is 8 bolts more. Hope it helps.

 

You should be fine with simply the Motordyne plenum spacer kit of your choice. You should save up the MREV2 monies and apply them to another mod.