I've had no difficulty finding complete AJ engines with about 60 K on the clock and I have most of an AJ engine for spare parts now, if needed. Ross had no trouble making me a set of forged pistons, Moldex makes crankshafts to order, and ditto on rods from GRP. Although I do race the car, and recognize the possibility of breakage, nothing has let go yet. Aside from aftermarket stuff, which is, as noted, readily available, I have at least a couple of everything I'm likely to need.
The real question is: Is it worth all the work and effort to put $15K to $20K into a relatively heavy sedan worth $2k to $6K. The car can be built to be quick, but will never be really fast.
I boils down to personal choice of what you want to do with your time, money and car…
If you have the time and money to do it, then do it, otherwise if you just talk about it, others will flame you.
The car is being built to be really fast. ECTA racing is about going fast, not quick, and I DO hold the record in my chosen class. In land speed racing the weight of the car is decidedly secondary.
Flamers seem to be largely from the direction of those who know all about it now that they're out of high school and have bought a cheap used car. My own is one I bought new and it has served me very well.
I do, very much, appreciate your input. You offer facts and reasons, not simply opinions. If we differ somewhat, I'll simply say that there is no human on the planet that I completely agree with.
KS