Its a direct bolt on and pistons dont matter, but the 1g or 2g pistons will not fit 4g64 block - these are 85mm, ans ours are 86.5mm bore. There are some minor modifications to 4 of the block passages - need to be plugged, and youll need coil setup instead of distributor. Youll also have little higher compression than the SOHC head.
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