Are My Arches Too Small?

No need to worry unless you put them on wrong, they are long enough for IVA. Besides there are bigger more stressy issues than front wings if folk not used the engine from the donor car if what I have been told is correct.

All engines not from donor car need to meet 2009 emission regs so rules out lots of stuff like Rover V8's and some older bike motors perhaps...but I can't find this written down and like I said it's what I have been told but I tend to err on the side of the geezer who told me as been involved with the Industry for 8 years and knows his stuff as built heaps of cars and getting them thru IVA.