" From: <mail@xxxxxxxxxxxx> " " I'd have to check, but I think I have M37 in the shed and it has no cooler line fittings " Mark Price wish i'd taken a good close look at my '67 marlin when i had it! 232/auto, which tsm says was m37... " From: <mail@xxxxxxxxxxxx> " " Al good points Tom. One thing to point out is that if you move up to a later model trans you don't have the kickdown cable to fuss with. They just use manifold vacumm. " Mark Price there was a vac control on the m37 too! i got a healthy 'discount' on the marlin when i bought it because it 'wouldn't shift automatically'. he was shifting it by hand, d1 and d2... i suspected the vac line was broken and it was stuck in full-throttle kickdown, and i was right. when i took it to a shop, they charged me $35 for some new fittings and it was right as rain. " From: farna@xxxxxxx " " I'm almost positive the M37 has external cooling line fittings, but " the M35 doesn't. I had a 63 and a 65 or 66 case, neither had cooling " lines available. I'd bet if you ordered external cooling you got a " M37. That would make sense, as you'd really only need external coling " for towing apps, which would need the bigger engine (232 vs. 199) and " tougher trans (M37 vs. M35). Just speculation at this point though. could be - but the '68 tsm only says 'm36 for 199, m37 for 232' and 'radiator trans cooler opt for 199 and 232'. '67 10-50-80 tsm is the same except no 199. that makes one think the cases -could- be drilled for cooling lines. my '66 01 tsm makes no mention of radiator cooler, even in fleet/hd equipt. ________________________________________________________________________ Andrew Hay the genius nature internet rambler is to see what all have seen adh@xxxxxxxxxxxxxxxxx and think what none thought