I have a blown engine on my 91 Accord LX Manual. It is currently running an F22A1 and I am thinking of swapping in an F22A6 in place. How hard of a swap is it and is it worth the time/money. My other option is an F22A1 from a 93 Prelude S Series, is there any incompatibilities between these engines that I should know about. Any help is much appreciated.