I'm getting ready to pull the 350 sbc/th350 out of my '36 Chevy pickup and replace it with a Mercruiser 120 (153 c.i., 2.5l) and a T5 manual trans. from an S-10.
The first order of business was the distributor. The boat version has no advance. They are typically idled or pegged and the rpm's build a bit slowly to their 4,000 rpm max.
The cheap fix is to get a rebuilt unit from an old Chevy ll with a vacuum advance. I wanted HEI for the low maintenance and gas mileage so Langdon's sold me one of the 2 models they produce for this engine.
The standard carburetion may work for you, I haven't tried it yet. I have a Weber 32/36 as is highly reccomended and an adaptor.
I'd prefer an aftermarket manifold, but good luck finding one! Same for headers.
As for flywheel, clutch and transmission, (or flexplate and automatic) it will fit a sbc or 230 inline 6 it will fit the Mercruiser. Sinc
