Thanks Teamstergrrrl for your reply.
Today I pulled the trigger and bought a1990 E7 400 HP manual engine for $6500. not really that familiar with the torque rise you mentioned......I do know the the newer higher HP Mack engines don't have the low end torque like I'm used to and you gotta shif before the RPM's get to low...... Let me tell ya what I thought and please correct me if I'm wrong; I thought an E-6 & E-7 was an "econodyne" engine which pulled down to a lower RPM (1020 best I can remember) E6 being the older and the E7 being the later version.
And I thought an EM6 & EM7 was Maxidyne version of the engine which pulls down to 1200 RPM before shifting. I also know there a later model E7 that is not manual and I know to stay clear of that to keep swap as simple as possible. Plaese advise me ASAP, if you don't mind, before I make a HUGE mistake. I have a Mack 18 speed I could put in my dump truck but I like the 2070 because you drive it like a 5 speed....I don't care for all the gear changing.....but in order to run this tranny I realize I need the low end that the old econodyne Mack had.
If I could get some clarification on E6 vs EM6 ,E7 vs EM7 and Maxidyne vs Econodyne as well as torque rise info that'd be great. I'll be sick if I spend this much money and get wrong combination of motor & tranny.
Thanks in advance for any input