360 vs 383

DionR said

This page says the '71 340 (Note - not detuned) net rating was 235/310.

https://www.hamtramck-historical.co...lershipDataBook/1971/71_Valiant_Duster_14.jpg

'74 360 factory rating (still net) was 245/320.

'73 340 was 240/295.

Still factory ratings so they could have monkeyed with them, NHRA sure didn't seem to think they were accurate.

Click to expand...

It's kind of interesting (to me) to compare the rated rpm's for these motors.

__________HP________TQ
'71 340 - 235@5000 - 310@3200
'73 340 - 240@4800 - 295@3600
'74 260 - 245@4800 - 320@3600

Doesn't make sense to me why the '73 340 with lower compression and a log manifold on the right was rated 5 hp higher than the '71 340. But the rated RPM is different, too. Maybe the first generation TQ hurt the hp on the '71? I mean, all three have the same cam so it would seem like peaks would be pretty close, right?