Full Force

iTrader: (5)

I have a 86 Baja with 400's, I was wondering if the 400 is closer to a 420 or a 330 as far as heads and shortblocks, anyone know for sure what they all have?

MOBILEMERCMAN

400's and 420's are very similar. 330 is completely different.
Jim

Full Force

iTrader: (5)

My 400's have the roller rockers on them, i was figuring they had the bigger rods and forged pistons also? someone put Holley carbs on them and got rid of the Q-jets, i know 420's had Holley.

rdoactive

330 heads are generally peanut port, stamped rockers. 400 + 420 are rectangular port + larger valves, roller
330 nodular iron crank, 400 + 420 steel crank.
Overall the 400 cyclone series are very good motors.
I think all the cyclones had holleys.

PatriYacht

The long blocks are the same for the 400 and 420. Even the cam and valvetrain are the same. The differences are in the carb, intake and exhaust. Good engines just a little small. The 330 is a low perf. pickup truck motor.

Full Force

iTrader: (5)

Cool, thanks, I wanted to know all the differences.

AIR TIME

pickup truck motor, hey I started out with one of old 330s and then a 502 and then a 509 now I elehapnt motor 572 or 598. ps I was telling someone the other day I blew more chit with the 330 17yrs ago spun props, burnt couplers, for 12yrs I have been running between 585hp and 670hp haven't spun anything knock on wood all with a stock b1 drive. them there lil truck motors can do some damage if you nail it from a standing start oh the 370 fits in with the 400 420 also nice strong motors to add blowers to. art