Ok so i'm a bit puzzled at this. 10110810 is the casting number for the heads off my 350 TBI truck engine 14093638. from one source they are 350 heads 65 cc chambers, from a 91 or newer. from another source they are 84-91 305 heads with 184/150 valves. first source was mortec, second is a smallblock ID guide. so my question is, does anyone have any true data? i only want to know because i don't have access to any way to measure the things, and if they are worth keeping for use on that same engine to go into my S-10.

I had a pair of those heads on my TBI crate engine. The 810s are heavy duty truck versions of the TBI swirl port head that replaced the 76cc 191 castings. They are 65.3cc chambers. The valves are 1.94/1.50s with oversize stems and sodium filled exhaust valves. You might also notice both intake and exhaust valve rotators on these.

Finally the engine may have a stock roller cam depending on when it was produced. 92+ should be roller cam equipped.

Ok now i know what dimension the heads are. I already know the block is a 88 roller block because of the bolt holes in the valley for the spider. Are those heads worth rebuilding? i don't have alot of money to spend so new heads are kinda out of range. when i rebuild this engine i'll get OE roller parts and stuff a comp cam in it. i don't intend it to be performance just mainly towing so torque is important.