[410cougar]

Originally posted by FoxChassis

I don't believe any production "385 Series/Family" block (370 (truck), 429, 460) ever had six-bolt-mains. As a matter of fact, I believe the only six-bolt-main block was/is the DOHC modular block.

The "335 Series/Family" includes 302C (Aussie), 351C, 351M (M is not Midland), and 400 (not 400M).

the 410 had 6 bolt
this was produced from 64-65 in mauraders
essentially a 390 with a 428 crank.
4 in the main caps and 2 in the block cross bolting it.

j

[Acooljt]

The 410 was also featured in the Mercury Monterey's. My grandpa has one in storage with the 410 Police Interceptor that he bought brand new back in 66. Only like 44,000 miles on it and all are highway miles.

[FoxChassis]

All the sources I'm finding says the FE 410 was '66-'67.

And they did have a crossbolt on mains 2, 3, and 4 but the only information I can find is that those mains had four bolts total (two through the caps, in the same fashion as all engines normally have, and two crossbolts) and not six and mains 1 and 5 had two bolts total.

If you can some solid info I can look at, please let me know. Again, I'm still learning...