yes, its a straight swap. Keep the 77 air flow meter if its still works, I think its bigger but I'm not sure. Dont scrap the old engine it has valuable parts. I also need so 80 zx parts.
I believe that he will need the ECU, and the FI wiring harness, plus some relays (fuel pump, fuel injection, etc) and some wiring workarounds to get the complete 1980 electronics system into his 1977. Probably worth it for a cleaner, better running engine, but not as simple as just bolting the 1977 electronics on to his 1980 hardware.theghosttanker said:Use the entire 1980 motor including the the electronics, sensors, and the air flow meter. The electronics were updated between 77 and 80. Check the clutch while it's apart; the haynes manual tells you the proper thicknesses for clutch discs and if yours is getting thin you will want to replace the clutch while you have it apart.
And that's a weird spelling of the word "weird"! P79 head never came on an N42 block. If you have an N42 block with the stock dished pistons and a stock P79 head, your compression ratio is somewhere down around 7.5:1. Candidate for 30 psi boost!skittle said:Huh thats wierd my 79 Zx had a n42 block but the p79 head as stock, at least as far as I know it was stock.