Was wondering what a 377 merc scorpion is made up of parts wise and what can be done to get more hp out of one. Thx for any info, Rm

3.75 x 4.00 is a 383. Or 388. .030 over.

Yhe dirt track guys take a 4.125 bore 400sbc and Run a 350 3.5” stroke crank and run a long rod.

Is the 377 cubic inches or hp?

if it’s 3.75 stroke it must use the pos 305 block which can’t be bored to 383.

Any one sell a blower kit to bump them up to around 500 ponies ?

Thanks, so at 4.030 it’s a 383. And 388 @ .060

It’s a low hour motor but weak af. If i buy it I’ll measure the bores as I will put in forged higher compression pistons, good rods with arp bolts balance the rotating Assm roller cam roller valve train and stud girdle some alum cylinder heads to get the heat out so I can run more compression.