I'm still working on my xe engine for the Manta. Have anyone of you tried a bored out throttle body on your otherwise stock XE engine? How's the performance increase? I had mine bored out to 71.3mm from I think 66mm. My head has been ported but I did'nt skim. I'll be using Schrick 276 cams with the stock Motronic 2.8. I only have a lightened pot type flywheel (8.5 kgs. as the car is heavy) and was balanced with the crankshaft assembly. Rod bolts are ARP. I'll still be using the SFi airbox with a funnel type air filter. How much power do you think I'll be seeing with this setup? That is, before I inject 85 horses of NOS! I'm just curious about the power with the stock ECU. I'll be upgrading to full programmable ecu in the near future. Any feedback would be appreciated! Cheers!