^^ you can keep p/s & a/c on a H22a conversion... Just have to make or purchase the right brackets.

I'm not trying to rubbish a b18c or anything but IMHO H22a conversion out ways a b18c conversion.

Most people put coil overs/spings & ITR LCA's etc in EG anyway which will support the added weight.

If you want raw N/A power = H22a

Go for a spin a H22a EG 1st then decide.