About a month ago I lost the bottom end in my 455 still runs but has a bad knock. So yesterda I bought a almost complete 455 from steve86ta off of here. Motor is torn apart but cleaned ready for assemblie just needs rings and rod bearings. So my build plans are
Std crank
Stock rods
New bearings
Arp rod bolts and main studs
30 over forged hi comp pistons
Clay smith .520 lift cam (can't rember the rest of the specs)
New lifters
Eitther restricted push rods or stuff roll pins into my stock one cause I'm cheap
Oil restrictors in the block (read a few differnt ways of doing this so somne needs to lern me)
12qt pan
I have ka heads with aftermarket springs and retainers or I have c heads off my old motor
Offy tunnel ram with two 600s
Malory unilite
And im probaly gonna build a set of zoomies just because I like to be the loud obnoxious d bag in my group.
Gonna probaly do external oil drains so if any one has a write up on where to drill and how to do it please share.
All said and done I will be into the entire engine for under a grand and I hope it will last the rest of the season.  Plan on swaping in a carb'd turbo ls motor next just don't want my boat down while I gather parts.

Dang but I really want em. Wonder f I could weld up some baffles inside of em to create a lil back presure

I know there pointless and that I will lose the scavenging affect of headers but will I really lose a noticeable amount of hp on a motor this mild?  Every "rat rod" guy runs them on stock junk yard pos motors and don't seem to have a problem. But forget the zoomies if I do build  set I'll keep my bassetts so I can switch back. Tunnel ram a dual 600s are pointless on my motor to butthey sure look neat.

I'm not sure where I'm being cheap but  I have absolutely zero intentions of keeping this boat olds powered I just fell into 90 percent of a fresh olds motor for damn near free. If it runs all season I'll be happy  I don't need it to last more than a few trips and inplan on going easy on it in hopes its still running when I'm dome with it. 

How big do I open the returns in the head

When I said high compression I meant "higher"  I think they are the 9.5ish ones but I'm just going by pictures of pistons I fond online.

Because I'm gathering parts to put ls motor in her but I don't wanna be boatless while I wait. Im putting quality parts in it planed on doing arp bolts through out and what ever brand gaskets you guys recomend.  Also plan on doing any oil mods I can do my self in my garage.  Machine work is done already and I already have the rotating assembly.  So I don't see how I'm being cheap still need to buy rod bearings so if there is a perfered brand let me know.

Spend ur money elsewhere... Stock lower end bolts are fine for your application.

The mods that you need to do on the lower end require grinding/porting... With that said, once done, the block will need to be re-hot tanked and thoroughly cleaned.




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Tried to google the part numberyesterda dindnt come up with anything

So 8ish to one? How can you tell just expeirence? Or is there a trick?

Read a little, that helps. Olds motors require someone that knows whats going on , when assembling them , that also includes what parts to use as in your choice of heads. Id use the Ka heads (but thats just me)

My first olds motor spun all the crank and rod bearings!!! I DID not build it. but it took less than 10 minutes to do it.

2287p is the part number people said trw and some said speed pro. But only info on the dish I found said .250 dish and mine are .140 so between that and looking at pics I assumed theywere high comp.   

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