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- - 283 and a Slight Hop Up (https://67-72chevytrucks.com/vboard/showthread.php?t=711810)

Re: 283 and a Slight Hop Up

I got my 283 almost ready to drop in soon. I will get pictures today looks really nice. Imo

Re: 283 and a Slight Hop Up

I will be rebuilding my 283 also. I thought about putting in a 350 with a 700R4 but the truck is original and since I always tell others with original trucks to keep them that way how could I not. Only switch is I now have a Muncie 3 speed with OD so I will be happy with that I hope.

Re: 283 and a Slight Hop Up

Quote:

Originally Posted by rvrfoot (Post 8044258)

Attachment 1691965

Attachment 1691966

I like it.

Re: 283 and a Slight Hop Up

Just curious about heads for a 283. I still have the original 283 in my truck and it has surprisingly really good compression. I've considered leaving it in and putting a different cam, intake, and carb. I've heard people using 305 heads and I was wondering if I could use a set of 1.94s I have off of a 350 on it? They have newer valve guides. I've heard old 283 heads don't handle the newer fuel that well. I don't know the casting # off hand. I also have a set of double hump 2.02 heads, but I figure they would be better on a 350. My guess is I could use them but the compression will be different??

Re: 283 and a Slight Hop Up

I think the lead that used to be in gas lubricated the valve guides. I think the new guides don't need the lead.

Re: 283 and a Slight Hop Up

Quote:

Originally Posted by Chevy Fleetside (Post 8044252)

That sounds like an awesome combo with the 3 speed OD!

Re: 283 and a Slight Hop Up

Quote:

Originally Posted by LostMy65 (Post 8044714)

I think the lead that used to be in gas lubricated the valve guides. I think the new guides don't need the lead.

Yes, my motor builder said he put the newer valve guides in.

Re: 283 and a Slight Hop Up

Quote:

Originally Posted by James903 (Post 8044669)

The 283 likes the 194 valves.
The seats are hardened on the newer heads for the unleaded fuel.

Re: 283 and a Slight Hop Up

Maybe I will try the 1.94s with the bigger cam. I kinda like the idea of a couple extra mounting holes on the front in the newer heads. I'm actually more curious how much better the 283 will run with some of the mods (carb,intake,cam,and different heads)

Re: 283 and a Slight Hop Up

Its hard not to have the holes in the front of the heads.

Re: 283 and a Slight Hop Up

Quote:

Originally Posted by rvrfoot (Post 8044258)

Attachment 1691965

Attachment 1691966

Looks killer!! :metal:

Re: 283 and a Slight Hop Up

Quote:

Originally Posted by jchav62 (Post 8044886)

Looks killer!! :metal:

Thanks

Re: 283 and a Slight Hop Up

Quote:

Originally Posted by sirJim (Post 8044632)

I like it.

thanks

Re: 283 and a Slight Hop Up

Quote:

Originally Posted by rvrfoot (Post 8044257)

Attachment 1691963

Attachment 1691962

Man that's beautiful.

Re: 283 and a Slight Hop Up

Quote:

Originally Posted by The Rocknrod (Post 8044914)

Man that's beautiful.

Thanks

Re: 283 and a Slight Hop Up

The problem with putting later model heads from a 350 onto a 283 is that the much larger combustion chambers will kill the compression on a 283. It will drop to likely 7 or 7.5-1. This is one of the reasons that the HO305 heads are widely used when upgrading a 283. The HO305 heads have 1.84 intake valves as opposed the the 1.74 intake valves in the old Power Pak heads, plus they have aprox 58cc combustion chambers.

Quote:

Originally Posted by James903 (Post 8044669)

Quote:

Originally Posted by James903 (Post 8044863)