Good engine for rebuild

[barnyard]

Found an engine for my 93 Larson 305 that needs replacing. It is a car engine 305 from 87 chevy with 9.3-1 compression and roller cam. What changes should i Make during rebuild eg cam, compression ect

 

[alldodge]

Truck/marine cam, marine head gaskets and brass or stainless core plugs

 

[barnyard]

Truck/marine cam, marine head gaskets and brass or stainless core plugs

Thanks-Could you suggest what aftermarket cam/ maker?

 

[Scott Danforth]

either a comp cam or crane cam.

nothing more than 264 degrees of total duration

if you have stock heads, nothing more than .450" lift (check your rocker arm ratio)

I would go 5.7 myself vs a 5.0. I would also jump to 96 and later vortec heads.

 

[alldodge]

Thanks-Could you suggest what aftermarket cam/ maker?

What Scott said
If you stick with the block and want to go stock, can look up online a 1988 or so Chevy pickup with same motor. Then use the cam that is listed

The Merc cam (not knowing serial number) 431-811658 (item 11) roller lifters
https://www.mercruiserparts.com/bam/subassembly/31735/1014/260

Could also find a truck motor in a junk yard

 

[kvkon]

Last time I checked the cost to overhaul the 305 is higher than the 350 and the 305 is heavier and makes less HP.

 

[Scott Danforth]

Last time I checked the cost to overhaul the 305 is higher than the 350 and the 305 is heavier and makes less HP.

Negligible cost difference

A 377 or 383 is also similar in cost

 

[76SeaRay]

If you decide to go 5.7l, I can give you the info with what I did on mine. First choice to make is on the block. I picked up a used 1996 truck block but the casting date code is actually 1995. Determine whether you want a roller cam and lifters. If so, study up on the block and roller cam/lifter notes. If the block is not machined for a roller setup, it requires special lifters with a bar across them. If it is machined, then you need "dog bones" to keep the roller lifters from spinning. Careful with used Vortec Heads, they may be cracked. Mine were and I had to replace them.

If you go this route, I can give you the part numbers for everything I bought, however, I haven't yet fired mine off on the engine stand (but very soon). I targeted mine at 300Hp since I have an Alpha One Gen One drive and targeted compression for 87 octane pump gas (this is a cruiser).