Megablade, megabusa and megabird are all the same chasis, it just depends what engine you want to put in it.
Megablade - Engine: Pre 1995 CBR900RR Honda Fireblade
0-60 4.1 seconds
Max Power: 128ps @ 10,000rpm
Max Torque: 90.83nm @ 8,500rpm
Megabird - Engine : Honda Super Blackbird 1100
0-60 3.9 seconds
Max Power: 165ps @ 9500rpm
Max Torque: 119.nm @ 7250rpm
Megabusa - Engine: GSXR1300R Suzuki Hayabusa
0-60 3.48 seconds
Max Power: 180ps @ 9800rpm
Max Torque: 138.29 NM @ 7000rpm
They all look like alot of fun. But maybe a Honda engine is the way to go?
They all have sequential boxes as well
I also think this chasis style looks much better than the caterham 7.