302 Roller Questions. - Ford Truck Enthusiasts Forums

Notices

302 Roller Questions.

Reply

 
 
 
  #1  
Old 06-18-2018, 11:41 PM
Bmoodie10
Bmoodie10 is offline
Freshman User
Thread Starter
Join Date: May 2018
Posts: 49
Bmoodie10 is starting off with a positive reputation.
302 Roller Questions.

Recently tore down a 79 block out of a project truck, further investigation and helps from the fine folks on this forum let me know the block was pretty much dead (060 over, bad cylinder scoring, yada yada yada).

started looking for a new block and Boom! Somebody shutting down a machine shop about an hour away was selling a rebuilt 85í roller motor! Came wrapped in plastic, crank and cam installed with all new bearings, pistons, etc.

Now! All the info Iíve got is for a older block. Got a few questions.

the original motor had a nice aftermarket cam in it that remained in good shape, can I run the older cam and pushrods with the new block and no problems?

if I went with the roller cam and lifters, would I need different push rods to work with my heads of the 79í block? Heads are same olí boat anchors, but theyíve been worked over, look great, and Iím not building a race car.

Any of the accessoryís change? Water pump? Oil pump? Timing chain cover? Fly wheel (changing to 50oz?)

my research on on the block says itís a HO, does that play into anything?

Sorry for the ramble, but almost like starting the build over, seeing what parts can be salvaged, and frantically trying to find receipts!
 
Reply With Quote
  #2  
Old 06-19-2018, 06:35 AM
baddad457
baddad457 is offline
Post Fiend
Join Date: May 2003
Location: south louisiana
Posts: 8,498
baddad457 has a great reputation on FTE.baddad457 has a great reputation on FTE.baddad457 has a great reputation on FTE.baddad457 has a great reputation on FTE.baddad457 has a great reputation on FTE.
The 85 roller block has basically the same iron content as the 80-84 block. They added 2 lbs for the taller lifter bores. Has the same thin decks that caused problems as the earlier ones. Not sure why you'd want to use a flat tappet cam in a roller block here. Roller pushrods are shorter by about a half inch. All the bolt holes are the same for all 302 blocks, so you can use any accessory setup, you cannot generally as a rule mix parts from one setup to another, you'll run into all sorts of fitment issues doing that. And there's no such thing as an HO block. Ford used the same blocks in all applications with different internals
 
Reply With Quote
  #3  
Old 06-19-2018, 12:30 PM
Bmoodie10
Bmoodie10 is offline
Freshman User
Thread Starter
Join Date: May 2018
Posts: 49
Bmoodie10 is starting off with a positive reputation.
Originally Posted by baddad457 View Post
The 85 roller block has basically the same iron content as the 80-84 block. They added 2 lbs for the taller lifter bores. Has the same thin decks that caused problems as the earlier ones. Not sure why you'd want to use a flat tappet cam in a roller block here. Roller pushrods are shorter by about a half inch. All the bolt holes are the same for all 302 blocks, so you can use any accessory setup, you cannot generally as a rule mix parts from one setup to another, you'll run into all sorts of fitment issues doing that. And there's no such thing as an HO block. Ford used the same blocks in all applications with different internals

I guess the only reason I was thinking about using the flat Tap cam was the fact that I have new lifters for it and I know that cam, push rod, lifter, Head combo works.

I gotcha itís not the greatest block. But finding something thatís freshly bored 030 over, re decked, new pistons, new bearings, new cam, and balanced, sitting in an engine bag still sealed up for 225 bucks is hard to argue with. And, itís my first time screwing around with a roller block, so If mess it up, no harm no foul! Lol! Youíve told me before to find something later than 92 I believe, thatís the plan later down the road once I got my sea legs.

Im assuming the flex plate And harmonic balancer will have to be 50oz versions because of the crankshaft on that year?
 
Reply With Quote
  #4  
Old 06-19-2018, 01:15 PM
baddad457
baddad457 is offline
Post Fiend
Join Date: May 2003
Location: south louisiana
Posts: 8,498
baddad457 has a great reputation on FTE.baddad457 has a great reputation on FTE.baddad457 has a great reputation on FTE.baddad457 has a great reputation on FTE.baddad457 has a great reputation on FTE.
Originally Posted by Bmoodie10 View Post



I guess the only reason I was thinking about using the flat Tap cam was the fact that I have new lifters for it and I know that cam, push rod, lifter, Head combo works.

I gotcha it’s not the greatest block. But finding something that’s freshly bored 030 over, re decked, new pistons, new bearings, new cam, and balanced, sitting in an engine bag still sealed up for 225 bucks is hard to argue with. And, it’s my first time screwing around with a roller block, so If mess it up, no harm no foul! Lol! You’ve told me before to find something later than 92 I believe, that’s the plan later down the road once I got my sea legs.

Im assuming the flex plate And harmonic balancer will have to be 50oz versions because of the crankshaft on that year?
How much did they mill off the decks ? You might have sealing issues with them milled. I would use FelPro 9333 gaskets then spray them liberally both sides with Kopper Kote spray to insure a good seal when bolting the heads on. New lifters today means squat. They're the reason people have cam lobe failures. Examine all on their lobe faces. They should be milled to a slight dome (convex) If any are not, toss the lifter in the scrap bucket. It will wipe the lobe in the 20 minutes it takes to break in the cam. If you use the roller cam, you won't have any worries about cam failures.Th eroller cam will out perform that flat tappet cam and will reduce the rotational friction in the motor, thus giving you more power
 
Reply With Quote
 
 
 


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.