Forged stroker crankshaft are available for M's. M &W made then, can't remember the company's name, VOLBRACHS
maybe, made a batch of stroker M,SM,400,450 crankshaft about a year ago, doubt they have any left.
That M with the GMC 702 Cid V-13 or Twin-Six as GMC called it was a higher rpm engine, especially the V-6's,
3600-3800 rpm, and loads of low rpm torque.
Somebody posted here about a year ago about putting a GMC V-6 in an M, haven't seen a word about it since.
I frequent the GMC V-6 forum, and some parts are still available for those engines. They made 305, 351, 401
& 478 Cid and 702 V-12. They made a few 637 Cid v-8's but not many.
Dad drove for a couple livestock trucking companies that used GMC V-6's, one TOUGH engine.
maybe, made a batch of stroker M,SM,400,450 crankshaft about a year ago, doubt they have any left.
That M with the GMC 702 Cid V-13 or Twin-Six as GMC called it was a higher rpm engine, especially the V-6's,
3600-3800 rpm, and loads of low rpm torque.
Somebody posted here about a year ago about putting a GMC V-6 in an M, haven't seen a word about it since.
I frequent the GMC V-6 forum, and some parts are still available for those engines. They made 305, 351, 401
& 478 Cid and 702 V-12. They made a few 637 Cid v-8's but not many.
Dad drove for a couple livestock trucking companies that used GMC V-6's, one TOUGH engine.