A AND A transmission makes a cross ram for the stock heads on a rb that is for the max wedge ports , they are un-machined for the stock aplication. you might be able to find a old eddy cross ram for the b block but theyve been going for a good chunk of change. Im running a 500 stroker with eddy victor max wedge aluminium heads and a stage 2 max wedge intake and 2 holley 600s so far it seems to be a good set-up but im still in the working the bugs out faze and havnt taken it out yet.